3 files changed, 8 insertions, 8 deletions
diff --git a/dom/file/BaseBlobImpl.h b/dom/file/BaseBlobImpl.h
index 7265fc2104..860421c56a 100644
--- a/dom/file/BaseBlobImpl.h
+++ b/dom/file/BaseBlobImpl.h
@@ -8,6 +8,7 @@
 #define mozilla_dom_BaseBlobImpl_h
 
 #include "nsIGlobalObject.h"
+#include "mozilla/dom/Blob.h"
 #include "mozilla/dom/BlobImpl.h"
 #include "mozilla/ErrorResult.h"
 
@@ -29,8 +30,7 @@ class BaseBlobImpl : public BlobImpl {
         mLength(aLength),
         mSerialNumber(NextSerialNumber()),
         mLastModificationDate(aLastModifiedDate) {
-    // Ensure non-null mContentType by default
-    mContentType.SetIsVoid(false);
+    dom::Blob::MakeValidBlobType(mContentType);
   }
 
   // Blob constructor without starting point.
@@ -41,8 +41,7 @@ class BaseBlobImpl : public BlobImpl {
         mLength(aLength),
         mSerialNumber(NextSerialNumber()),
         mLastModificationDate(0) {
-    // Ensure non-null mContentType by default
-    mContentType.SetIsVoid(false);
+    dom::Blob::MakeValidBlobType(mContentType);
   }
 
   // Blob constructor with starting point.
@@ -53,8 +52,7 @@ class BaseBlobImpl : public BlobImpl {
         mLength(aLength),
         mSerialNumber(NextSerialNumber()),
         mLastModificationDate(0) {
-    // Ensure non-null mContentType by default
-    mContentType.SetIsVoid(false);
+    dom::Blob::MakeValidBlobType(mContentType);
   }
 
   void GetName(nsAString& aName) const override;
diff --git a/dom/file/Blob.cpp b/dom/file/Blob.cpp
index 868e501ef9..b3a83d6f0f 100644
--- a/dom/file/Blob.cpp
+++ b/dom/file/Blob.cpp
@@ -50,6 +50,9 @@ NS_IMPL_CYCLE_COLLECTING_ADDREF(Blob)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(Blob)
 
 void Blob::MakeValidBlobType(nsAString& aType) {
+  // Ensure non-null content type by default
+  aType.SetIsVoid(false);
+
   char16_t* iter = aType.BeginWriting();
   char16_t* end = aType.EndWriting();
 
diff --git a/dom/file/FileReaderSync.cpp b/dom/file/FileReaderSync.cpp
index 04e5325ea3..431d7b7b71 100644
--- a/dom/file/FileReaderSync.cpp
+++ b/dom/file/FileReaderSync.cpp
@@ -315,8 +315,7 @@ class ReadReadyRunnable final : public WorkerSyncRunnable {
  public:
   ReadReadyRunnable(WorkerPrivate* aWorkerPrivate,
                     nsIEventTarget* aSyncLoopTarget)
-      : WorkerSyncRunnable(aWorkerPrivate, aSyncLoopTarget,
-                           "ReadReadyRunnable") {}
+      : WorkerSyncRunnable(aSyncLoopTarget, "ReadReadyRunnable") {}
 
   bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
     aWorkerPrivate->AssertIsOnWorkerThread();