DevTools: remove unused constant declarations and redundant parameter

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

Index: Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp
diff --git a/Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp b/Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp
index 36aeb66b7016756e7c0b25800fe2380fab06c70f..4091b25fb63b6e5688764c3b82816ffe45e30b9f 100644
--- a/Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp
+++ b/Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp
@@ -47,9 +47,9 @@
 
 namespace blink {
 
-InjectedScriptManager::CallbackData* InjectedScriptManager::createCallbackData(InjectedScriptManager* injectedScriptManager)
+InjectedScriptManager::CallbackData* InjectedScriptManager::createCallbackData()
 {
-    OwnPtrWillBeRawPtr<InjectedScriptManager::CallbackData> callbackData = InjectedScriptManager::CallbackData::create(injectedScriptManager);
+    OwnPtrWillBeRawPtr<InjectedScriptManager::CallbackData> callbackData = InjectedScriptManager::CallbackData::create(this);
     InjectedScriptManager::CallbackData* callbackDataPtr = callbackData.get();
     m_callbackDataSet.add(callbackData.release());
     return callbackDataPtr;
@@ -72,7 +72,7 @@ static v8::Local<v8::Object> createInjectedScriptHostV8Wrapper(v8::Isolate* isol
 
     // Create a weak reference to the v8 wrapper of InspectorBackend to deref
     // InspectorBackend when the wrapper is garbage collected.
-    InjectedScriptManager::CallbackData* callbackData = injectedScriptManager->createCallbackData(injectedScriptManager);
+    InjectedScriptManager::CallbackData* callbackData = injectedScriptManager->createCallbackData();
     callbackData->host = host.get();
     callbackData->handle.set(isolate, wrapper);
     callbackData->handle.setWeak(callbackData, &InjectedScriptManager::setWeakCallback);