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diff --git a/toolkit/crashreporter/google-breakpad/src/common/arm_ex_to_module.h b/toolkit/crashreporter/google-breakpad/src/common/arm_ex_to_module.h
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+/* libunwind - a platform-independent unwind library
+   Copyright 2011 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+// Copyright (c) 2010 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.
+
+
+// Derived from libunwind, with extensive modifications.
+
+#ifndef COMMON_ARM_EX_TO_MODULE__
+#define COMMON_ARM_EX_TO_MODULE__
+
+#include "common/module.h"
+
+#include <string.h>
+
+namespace arm_ex_to_module {
+
+using google_breakpad::Module;
+
+typedef enum extab_cmd {
+  ARM_EXIDX_CMD_FINISH,
+  ARM_EXIDX_CMD_SUB_FROM_VSP,
+  ARM_EXIDX_CMD_ADD_TO_VSP,
+  ARM_EXIDX_CMD_REG_POP,
+  ARM_EXIDX_CMD_REG_TO_SP,
+  ARM_EXIDX_CMD_VFP_POP,
+  ARM_EXIDX_CMD_WREG_POP,
+  ARM_EXIDX_CMD_WCGR_POP,
+  ARM_EXIDX_CMD_RESERVED,
+  ARM_EXIDX_CMD_REFUSED,
+} extab_cmd_t;
+
+struct exidx_entry {
+  uint32_t addr;
+  uint32_t data;
+};
+
+struct extab_data {
+  extab_cmd_t cmd;
+  uint32_t data;
+};
+
+enum extab_cmd_flags {
+  ARM_EXIDX_VFP_SHIFT_16 = 1 << 16,
+  ARM_EXIDX_VFP_FSTMD = 1 << 17, // distinguishes FSTMxxD from FSTMxxX
+};
+
+// Receives information from arm_ex_reader::ExceptionTableInfo
+// and adds it to the Module object
+class ARMExToModule {
+ public:
+  ARMExToModule(Module* module)
+      : module_(module) { }
+  ~ARMExToModule() { }
+  bool HasStackFrame(uintptr_t addr, size_t size);
+  void AddStackFrame(uintptr_t addr, size_t size);
+  int ImproveStackFrame(const struct extab_data* edata);
+  void DeleteStackFrame();
+  void SubmitStackFrame();
+ private:
+  Module* module_;
+  Module::StackFrameEntry* stack_frame_entry_;
+  string vsp_;
+  int TranslateCmd(const struct extab_data* edata,
+                   Module::StackFrameEntry* entry,
+                   string& vsp);
+};
+
+} // namespace arm_ex_to_module
+
+#endif // COMMON_ARM_EX_TO_MODULE__