Replace several uses of toWebCoreString() by V8TRYCATCH_FOR_V8STRINGRESOURCE() macro

Source/bindings/v8/custom/V8HTMLCanvasElementCustom.cpp

 /*
  * Copyright (C) 2007-2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 33 matching lines @@
 #include "core/inspector/InspectorCanvasInstrumentation.h"
 #include "wtf/MathExtras.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 void V8HTMLCanvasElement::getContextMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     v8::Handle<v8::Object> holder = args.Holder();
     HTMLCanvasElement* imp = V8HTMLCanvasElement::toNative(holder);
-    String contextId = toWebCoreString(args[0]);
+    V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, contextIdResource, args[0]);
+    String contextId = contextIdResource;
     RefPtr<CanvasContextAttributes> attributes;
     if (contextId == "webgl" || contextId == "experimental-webgl" || contextId == "webkit-3d") {
         RefPtr<WebGLContextAttributes> webGLAttributes = WebGLContextAttributes::create();
         if (args.Length() > 1 && args[1]->IsObject()) {
             v8::Handle<v8::Object> jsAttributes = args[1]->ToObject();
             v8::Handle<v8::String> alpha = v8::String::NewSymbol("alpha");
             if (jsAttributes->Has(alpha))
                 webGLAttributes->setAlpha(jsAttributes->Get(alpha)->BooleanValue());
             v8::Handle<v8::String> depth = v8::String::NewSymbol("depth");
             if (jsAttributes->Has(depth))
@@ skipping 58 matching lines @@
     ASSERT_NOT_REACHED();
     v8SetReturnValueNull(args);
 }
 
 void V8HTMLCanvasElement::toDataURLMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     v8::Handle<v8::Object> holder = args.Holder();
     HTMLCanvasElement* canvas = V8HTMLCanvasElement::toNative(holder);
     ExceptionState es(args.GetIsolate());
 
-    String type = toWebCoreString(args[0]);
+    V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, type, args[0]);
     double quality;
     double* qualityPtr = 0;
     if (args.Length() > 1 && args[1]->IsNumber()) {
         quality = args[1]->NumberValue();
         qualityPtr = &quality;
     }
 
     String result = canvas->toDataURL(type, qualityPtr, es);
     es.throwIfNeeded();
     v8SetReturnValueStringOrUndefined(args, result, args.GetIsolate());
 }
 
 } // namespace WebCore