[refactor] Use "return false" instead of "return 0".

Source/bindings/v8/SerializedScriptValue.cpp

 /*
  * 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
@@ skipping 1337 matching lines @@
             m_writer.writeFileListIndex(blobIndices);
         else
             m_writer.writeFileList(*fileList);
         return 0;
     }
 
     bool writeCryptoKey(v8::Handle<v8::Value> value)
     {
         Key* key = V8Key::toNative(value.As<v8::Object>());
         if (!key)
-            return 0;
+            return false;
         return m_writer.writeCryptoKey(key->key());
     }
 
     void writeImageData(v8::Handle<v8::Value> value)
     {
         ImageData* imageData = V8ImageData::toNative(value.As<v8::Object>());
         if (!imageData)
             return;
         Uint8ClampedArray* pixelArray = imageData->data();
         m_writer.writeImageData(imageData->width(), imageData->height(), pixelArray->data(), pixelArray->length());
@@ skipping 1689 matching lines @@
     // If the allocated memory was not registered before, then this class is likely
     // used in a context other then Worker's onmessage environment and the presence of
     // current v8 context is not guaranteed. Avoid calling v8 then.
     if (m_externallyAllocatedMemory) {
         ASSERT(v8::Isolate::GetCurrent());
         v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(-m_externallyAllocatedMemory);
     }
 }
 
 } // namespace WebCore