Update memory related v8 notifications API calls

Source/bindings/core/v8/ScriptProfiler.cpp

 /*
  * Copyright (c) 2011, 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 78 matching lines @@
     if (profileIdleTime != profileNameIdleTimeMap->end()) {
         idleTime = profileIdleTime->value * 1000.0;
         profileNameIdleTimeMap->remove(profileIdleTime);
     }
 
     return ScriptProfile::create(profile, idleTime);
 }
 
 void ScriptProfiler::collectGarbage()
 {
-    v8::V8::LowMemoryNotification();
+    v8::Isolate::GetCurrent()->LowMemoryNotification();
 }
 
 ScriptValue ScriptProfiler::objectByHeapObjectId(unsigned id)
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     v8::HeapProfiler* profiler = isolate->GetHeapProfiler();
     v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Value> value = profiler->FindObjectById(id);
     if (value.IsEmpty() || !value->IsObject())
         return ScriptValue();
@@ skipping 191 matching lines @@
 }
 
 void ScriptProfiler::setIdle(bool isIdle)
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     if (v8::CpuProfiler* profiler = isolate->GetCpuProfiler())
         profiler->SetIdle(isIdle);
 }
 
 } // namespace blink