[bindings] Remove the last traces of V8RethrowTryCatchScope from V8Binding.h

Source/bindings/core/v8/V8Binding.h

 /*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2012 Ericsson AB. 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 1026 matching lines @@
     void ensureInitialized() const;
 
     mutable int m_scriptId;
     mutable int m_lineNumber;
     mutable String m_resourceName;
     mutable v8::Handle<v8::Function> m_function;
 };
 
 PassRefPtr<TraceEvent::ConvertableToTraceFormat> devToolsTraceEventData(v8::Isolate*, ExecutionContext*, v8::Handle<v8::Function>);
 
-class V8RethrowTryCatchScope final {
-public:
-    explicit V8RethrowTryCatchScope(v8::TryCatch& block) : m_block(block) { }
-    ~V8RethrowTryCatchScope()
-    {
-        // ReThrow() is a no-op if no exception has been caught, so always call.
-        m_block.ReThrow();
-    }
-
-private:
-    v8::TryCatch& m_block;
-};
-
 // Callback functions used by generated code.
 void v8ConstructorAttributeGetterAsProperty(v8::Local<v8::Name> propertyName, const v8::PropertyCallbackInfo<v8::Value>&);
 void v8ConstructorAttributeGetterAsAccessor(const v8::FunctionCallbackInfo<v8::Value>&);
 
 typedef void (*InstallTemplateFunction)(v8::Local<v8::FunctionTemplate>, v8::Isolate*);
 
 } // namespace blink
 
 #endif // V8Binding_h