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diff --git a/toolkit/crashreporter/google-breakpad/src/tools/linux/md2core/minidump_memory_range_unittest.cc b/toolkit/crashreporter/google-breakpad/src/tools/linux/md2core/minidump_memory_range_unittest.cc
new file mode 100644
index 0000000000..fe4ded83dc
--- /dev/null
+++ b/toolkit/crashreporter/google-breakpad/src/tools/linux/md2core/minidump_memory_range_unittest.cc
@@ -0,0 +1,258 @@
+// Copyright (c) 2011, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// minidump_memory_range_unittest.cc:
+// Unit tests for google_breakpad::MinidumpMemoryRange.
+
+#include "breakpad_googletest_includes.h"
+#include "tools/linux/md2core/minidump_memory_range.h"
+
+using google_breakpad::MinidumpMemoryRange;
+using testing::Message;
+
+namespace {
+
+const uint32_t kBuffer[10] = { 0 };
+const size_t kBufferSize = sizeof(kBuffer);
+const uint8_t* kBufferPointer = reinterpret_cast<const uint8_t*>(kBuffer);
+
+// Test vectors for verifying Covers, GetData, and Subrange.
+const struct {
+  bool valid;
+  size_t offset;
+  size_t length;
+} kSubranges[] = {
+  { true, 0, 0 },
+  { true, 0, 2 },
+  { true, 0, kBufferSize },
+  { true, 2, 0 },
+  { true, 2, 4 },
+  { true, 2, kBufferSize - 2 },
+  { true, kBufferSize - 1, 1 },
+  { false, kBufferSize, 0 },
+  { false, kBufferSize, static_cast<size_t>(-1) },
+  { false, kBufferSize + 1, 0 },
+  { false, static_cast<size_t>(-1), 2 },
+  { false, 1, kBufferSize },
+  { false, kBufferSize - 1, 2 },
+  { false, 0, static_cast<size_t>(-1) },
+  { false, 1, static_cast<size_t>(-1) },
+};
+const size_t kNumSubranges = sizeof(kSubranges) / sizeof(kSubranges[0]);
+
+// Test vectors for verifying GetArrayElement.
+const struct {
+  size_t offset;
+  size_t size;
+  size_t index;
+  const void* const pointer;
+} kElements[] = {
+  // Valid array elemenets
+  { 0, 1, 0, kBufferPointer },
+  { 0, 1, 1, kBufferPointer + 1 },
+  { 0, 1, kBufferSize - 1, kBufferPointer + kBufferSize - 1 },
+  { 0, 2, 1, kBufferPointer + 2 },
+  { 0, 4, 2, kBufferPointer + 8 },
+  { 0, 4, 9, kBufferPointer + 36 },
+  { kBufferSize - 1, 1, 0, kBufferPointer + kBufferSize - 1 },
+  // Invalid array elemenets
+  { 0, 1, kBufferSize, NULL },
+  { 0, 4, 10, NULL },
+  { kBufferSize - 1, 1, 1, NULL },
+  { kBufferSize - 1, 2, 0, NULL },
+  { kBufferSize, 1, 0, NULL },
+};
+const size_t kNumElements = sizeof(kElements) / sizeof(kElements[0]);
+
+}  // namespace
+
+TEST(MinidumpMemoryRangeTest, DefaultConstructor) {
+  MinidumpMemoryRange range;
+  EXPECT_EQ(NULL, range.data());
+  EXPECT_EQ(0U, range.length());
+}
+
+TEST(MinidumpMemoryRangeTest, ConstructorWithDataAndLength) {
+  MinidumpMemoryRange range(kBuffer, kBufferSize);
+  EXPECT_EQ(kBufferPointer, range.data());
+  EXPECT_EQ(kBufferSize, range.length());
+}
+
+TEST(MinidumpMemoryRangeTest, Reset) {
+  MinidumpMemoryRange range;
+  range.Reset();
+  EXPECT_EQ(NULL, range.data());
+  EXPECT_EQ(0U, range.length());
+
+  range.Set(kBuffer, kBufferSize);
+  EXPECT_EQ(kBufferPointer, range.data());
+  EXPECT_EQ(kBufferSize, range.length());
+
+  range.Reset();
+  EXPECT_EQ(NULL, range.data());
+  EXPECT_EQ(0U, range.length());
+}
+
+TEST(MinidumpMemoryRangeTest, Set) {
+  MinidumpMemoryRange range;
+  range.Set(kBuffer, kBufferSize);
+  EXPECT_EQ(kBufferPointer, range.data());
+  EXPECT_EQ(kBufferSize, range.length());
+
+  range.Set(NULL, 0);
+  EXPECT_EQ(NULL, range.data());
+  EXPECT_EQ(0U, range.length());
+}
+
+TEST(MinidumpMemoryRangeTest, SubrangeOfEmptyMemoryRange) {
+  MinidumpMemoryRange range;
+  MinidumpMemoryRange subrange = range.Subrange(0, 10);
+  EXPECT_EQ(NULL, subrange.data());
+  EXPECT_EQ(0U, subrange.length());
+}
+
+TEST(MinidumpMemoryRangeTest, SubrangeAndGetData) {
+  MinidumpMemoryRange range(kBuffer, kBufferSize);
+  for (size_t i = 0; i < kNumSubranges; ++i) {
+    bool valid = kSubranges[i].valid;
+    size_t sub_offset = kSubranges[i].offset;
+    size_t sub_length = kSubranges[i].length;
+    SCOPED_TRACE(Message() << "offset=" << sub_offset
+                 << ", length=" << sub_length);
+
+    MinidumpMemoryRange subrange = range.Subrange(sub_offset, sub_length);
+    if (valid) {
+      EXPECT_TRUE(range.Covers(sub_offset, sub_length));
+      EXPECT_EQ(kBufferPointer + sub_offset,
+                range.GetData(sub_offset, sub_length));
+      EXPECT_EQ(kBufferPointer + sub_offset, subrange.data());
+      EXPECT_EQ(sub_length, subrange.length());
+    } else {
+      EXPECT_FALSE(range.Covers(sub_offset, sub_length));
+      EXPECT_EQ(NULL, range.GetData(sub_offset, sub_length));
+      EXPECT_EQ(NULL, subrange.data());
+      EXPECT_EQ(0U, subrange.length());
+    }
+  }
+}
+
+TEST(MinidumpMemoryRangeTest, SubrangeWithMDLocationDescriptor) {
+  MinidumpMemoryRange range(kBuffer, kBufferSize);
+  for (size_t i = 0; i < kNumSubranges; ++i) {
+    bool valid = kSubranges[i].valid;
+    size_t sub_offset = kSubranges[i].offset;
+    size_t sub_length = kSubranges[i].length;
+    SCOPED_TRACE(Message() << "offset=" << sub_offset
+                 << ", length=" << sub_length);
+
+    MDLocationDescriptor location;
+    location.rva = sub_offset;
+    location.data_size = sub_length;
+    MinidumpMemoryRange subrange = range.Subrange(location);
+    if (valid) {
+      EXPECT_TRUE(range.Covers(sub_offset, sub_length));
+      EXPECT_EQ(kBufferPointer + sub_offset,
+                range.GetData(sub_offset, sub_length));
+      EXPECT_EQ(kBufferPointer + sub_offset, subrange.data());
+      EXPECT_EQ(sub_length, subrange.length());
+    } else {
+      EXPECT_FALSE(range.Covers(sub_offset, sub_length));
+      EXPECT_EQ(NULL, range.GetData(sub_offset, sub_length));
+      EXPECT_EQ(NULL, subrange.data());
+      EXPECT_EQ(0U, subrange.length());
+    }
+  }
+}
+
+TEST(MinidumpMemoryRangeTest, GetDataWithTemplateType) {
+  MinidumpMemoryRange range(kBuffer, kBufferSize);
+  const char* char_pointer = range.GetData<char>(0);
+  EXPECT_EQ(reinterpret_cast<const char*>(kBufferPointer), char_pointer);
+  const int* int_pointer = range.GetData<int>(0);
+  EXPECT_EQ(reinterpret_cast<const int*>(kBufferPointer), int_pointer);
+}
+
+TEST(MinidumpMemoryRangeTest, GetArrayElement) {
+  MinidumpMemoryRange range(kBuffer, kBufferSize);
+  for (size_t i = 0; i < kNumElements; ++i) {
+    size_t element_offset = kElements[i].offset;
+    size_t element_size = kElements[i].size;
+    unsigned element_index = kElements[i].index;
+    const void* const element_pointer = kElements[i].pointer;
+    SCOPED_TRACE(Message() << "offset=" << element_offset
+                 << ", size=" << element_size
+                 << ", index=" << element_index);
+    EXPECT_EQ(element_pointer, range.GetArrayElement(
+        element_offset, element_size, element_index));
+  }
+}
+
+TEST(MinidumpMemoryRangeTest, GetArrayElmentWithTemplateType) {
+  MinidumpMemoryRange range(kBuffer, kBufferSize);
+  const char* char_pointer = range.GetArrayElement<char>(0, 0);
+  EXPECT_EQ(reinterpret_cast<const char*>(kBufferPointer), char_pointer);
+  const int* int_pointer = range.GetArrayElement<int>(0, 0);
+  EXPECT_EQ(reinterpret_cast<const int*>(kBufferPointer), int_pointer);
+}
+
+TEST(MinidumpMemoryRangeTest, GetAsciiMDString) {
+  uint8_t buffer[100] = { 0 };
+
+  MDString* md_str = reinterpret_cast<MDString*>(buffer);
+  md_str->length = 4;
+  md_str->buffer[0] = 'T';
+  md_str->buffer[1] = 'e';
+  md_str->buffer[2] = 's';
+  md_str->buffer[3] = 't';
+  md_str->buffer[4] = '\0';
+
+  size_t str2_offset =
+      sizeof(MDString) + (md_str->length + 1) * sizeof(uint16_t);
+
+  md_str = reinterpret_cast<MDString*>(buffer + str2_offset);
+  md_str->length = 9;  // Test length larger than actual string
+  md_str->buffer[0] = 'S';
+  md_str->buffer[1] = 't';
+  md_str->buffer[2] = 'r';
+  md_str->buffer[3] = 'i';
+  md_str->buffer[4] = 'n';
+  md_str->buffer[5] = 'g';
+  md_str->buffer[6] = '\0';
+  md_str->buffer[7] = '1';
+  md_str->buffer[8] = '2';
+
+  MinidumpMemoryRange range(buffer, sizeof(buffer));
+  EXPECT_EQ("Test", range.GetAsciiMDString(0));
+  EXPECT_EQ("String", range.GetAsciiMDString(str2_offset));
+
+  // Test out-of-bounds cases.
+  EXPECT_EQ("", range.GetAsciiMDString(
+      sizeof(buffer) - sizeof(MDString) + 1));
+  EXPECT_EQ("", range.GetAsciiMDString(sizeof(buffer)));
+}