Implement Blink-side changes to enable V8 code caching.

Source/bindings/core/v8/V8ScriptRunner.h

Index: Source/bindings/core/v8/V8ScriptRunner.h
diff --git a/Source/bindings/core/v8/V8ScriptRunner.h b/Source/bindings/core/v8/V8ScriptRunner.h
index 5d1c982f5fc68aa867dc8d5fd500514322cf968f..287352ee767b13c9b2e279d4d83f6fdc9eaf3573 100644
--- a/Source/bindings/core/v8/V8ScriptRunner.h
+++ b/Source/bindings/core/v8/V8ScriptRunner.h
@@ -42,8 +42,8 @@ class V8ScriptRunner {
 public:
     // For the following methods, the caller sites have to hold
     // a HandleScope and a ContextScope.
-    static v8::Local<v8::Script> compileScript(const ScriptSourceCode&, v8::Isolate*, AccessControlStatus = SharableCrossOrigin);
-    static v8::Local<v8::Script> compileScript(v8::Handle<v8::String>, const String& fileName, const TextPosition&, ScriptResource*, v8::Isolate*, AccessControlStatus = SharableCrossOrigin);
+    static v8::Local<v8::Script> compileScript(const ScriptSourceCode&, v8::Isolate*, AccessControlStatus = SharableCrossOrigin, const String& = String());
+    static v8::Local<v8::Script> compileScript(v8::Handle<v8::String>, const String& fileName, const TextPosition&, ScriptResource*, v8::Isolate*, AccessControlStatus = SharableCrossOrigin, const String& = String());
     static v8::Local<v8::Value> runCompiledScript(v8::Handle<v8::Script>, ExecutionContext*, v8::Isolate*);
     static v8::Local<v8::Value> compileAndRunInternalScript(v8::Handle<v8::String>, v8::Isolate*, const String& = String(), const TextPosition& = TextPosition());
     static v8::Local<v8::Value> callInternalFunction(v8::Handle<v8::Function>, v8::Handle<v8::Value> receiver, int argc, v8::Handle<v8::Value> info[], v8::Isolate*);