bindings: Use Maybe version of Get in bindings/

Source/bindings/core/v8/V8PerIsolateData.cpp

 /*
  * Copyright (C) 2009 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 222 matching lines @@
 static void constructorOfToString(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     // The DOM constructors' toString functions grab the current toString
     // for Functions by taking the toString function of itself and then
     // calling it with the constructor as its receiver. This means that
     // changes to the Function prototype chain or toString function are
     // reflected when printing DOM constructors. The only wart is that
     // changes to a DOM constructor's toString's toString will cause the
     // toString of the DOM constructor itself to change. This is extremely
     // obscure and unlikely to be a problem.
-    v8::Handle<v8::Value> value = info.Callee()->Get(v8AtomicString(info.GetIsolate(), "toString"));
-    if (!value->IsFunction()) {
-        v8SetReturnValue(info, v8::String::Empty(info.GetIsolate()));
+    v8::Isolate* isolate = info.GetIsolate();
+    v8::Local<v8::Value> value;
+    if (!info.Callee()->Get(isolate->GetCurrentContext(), v8AtomicString(isolate, "toString")).ToLocal(&value) ||  !value->IsFunction()) {

[Yuki, 2015/04/07 07:37:57]

nit: two spaces after ||.

[bashi, 2015/04/07 08:47:01]

Done.

+        v8SetReturnValue(info, v8::String::Empty(isolate));
         return;
     }
     v8::Local<v8::Value> result;
-    if (V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function>::Cast(value), info.This(), 0, 0, info.GetIsolate()).ToLocal(&result))
+    if (V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function>::Cast(value), info.This(), 0, 0, isolate).ToLocal(&result))
         v8SetReturnValue(info, result);
 }
 
 v8::Handle<v8::FunctionTemplate> V8PerIsolateData::toStringTemplate()
 {
     if (m_toStringTemplate.isEmpty())
         m_toStringTemplate.set(isolate(), v8::FunctionTemplate::New(isolate(), constructorOfToString));
     return m_toStringTemplate.newLocal(isolate());
 }
 
@@ skipping 16 matching lines @@
     m_endOfScopeTasks.clear();
 }
 
 void V8PerIsolateData::setScriptDebugServer(PassOwnPtrWillBeRawPtr<ScriptDebugServer> server)
 {
     ASSERT(!m_debugServer);
     m_debugServer = server;
 }
 
 } // namespace blink