bindings: Use Maybe APIs in V8ScriptRunner (part 1)

Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp

 /*
  * Copyright (C) 2012 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 84 matching lines @@
     if (scriptHostWrapper.IsEmpty())
         return ScriptValue();
 
     injectedScriptNative->setOnInjectedScriptHost(scriptHostWrapper);
 
     // Inject javascript into the context. The compiled script is supposed to evaluate into
     // a single anonymous function(it's anonymous to avoid cluttering the global object with
     // inspector's stuff) the function is called a few lines below with InjectedScriptHost wrapper,
     // injected script id and explicit reference to the inspected global object. The function is expected
     // to create and configure InjectedScript instance that is going to be used by the inspector.
-    v8::Local<v8::Value> value = V8ScriptRunner::compileAndRunInternalScript(v8String(isolate, scriptSource), isolate);
-    ASSERT(!value.IsEmpty());
+    v8::Local<v8::Value> value;
+    if (!V8ScriptRunner::compileAndRunInternalScript(v8String(isolate, scriptSource), isolate).ToLocal(&value))
+        return ScriptValue();
     ASSERT(value->IsFunction());
 
     v8::Local<v8::Object> windowGlobal = inspectedScriptState->context()->Global();
     v8::Handle<v8::Value> info[] = { scriptHostWrapper, windowGlobal, v8::Number::New(inspectedScriptState->isolate(), id) };
     v8::Local<v8::Value> injectedScriptValue = V8ScriptRunner::callInternalFunction(v8::Local<v8::Function>::Cast(value), windowGlobal, WTF_ARRAY_LENGTH(info), info, inspectedScriptState->isolate());
     return ScriptValue(inspectedScriptState, injectedScriptValue);
 }
 
 bool InjectedScriptManager::canAccessInspectedWindow(ScriptState* scriptState)
 {
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Object> global = scriptState->context()->Global();
     if (global.IsEmpty())
         return false;
     v8::Handle<v8::Object> holder = V8Window::findInstanceInPrototypeChain(global, scriptState->isolate());
     if (holder.IsEmpty())
         return false;
     LocalFrame* frame = toLocalDOMWindow(V8Window::toImpl(holder))->frame();
 
     return BindingSecurity::shouldAllowAccessToFrame(scriptState->isolate(), frame, DoNotReportSecurityError);
 }
 
 void InjectedScriptManager::setWeakCallback(const v8::WeakCallbackData<v8::Object, InjectedScriptManager::CallbackData>& data)
 {
     InjectedScriptManager::CallbackData* callbackData = data.GetParameter();
     callbackData->injectedScriptManager->removeCallbackData(callbackData);
 }
 
 } // namespace blink