FYI: Compile fixes when always using a local for method return value

Source/core/testing/Internals.h

Index: Source/core/testing/Internals.h
diff --git a/Source/core/testing/Internals.h b/Source/core/testing/Internals.h
index f7321ad9c0d79558d6b5c0025fedcbe632235c46..00a09d11aa99f3d85f823b6f1dfc902d0ec7b1b2 100644
--- a/Source/core/testing/Internals.h
+++ b/Source/core/testing/Internals.h
@@ -179,7 +179,7 @@ public:
     int lastSpellCheckRequestSequence(Document*, ExceptionState&);
     int lastSpellCheckProcessedSequence(Document*, ExceptionState&);
 
-    Vector<AtomicString> userPreferredLanguages() const;
+    Vector<String> userPreferredLanguages() const;
     void setUserPreferredLanguages(const Vector<String>&);
 
     unsigned activeDOMObjectCount(Document*, ExceptionState&);
@@ -236,7 +236,7 @@ public:
     Vector<String> consoleMessageArgumentCounts(Document*) const;
     PassRefPtrWillBeRawPtr<LocalDOMWindow> openDummyInspectorFrontend(const String& url);
     void closeDummyInspectorFrontend();
-    Vector<unsigned long> setMemoryCacheCapacities(unsigned long minDeadBytes, unsigned long maxDeadBytes, unsigned long totalBytes);
+    Vector<unsigned> setMemoryCacheCapacities(unsigned long minDeadBytes, unsigned long maxDeadBytes, unsigned long totalBytes);
     void setInspectorResourcesDataSizeLimits(int maximumResourcesContentSize, int maximumSingleResourceContentSize, ExceptionState&);
 
     String counterValue(Element*);