Cleanup namespace usage in Source/core/{dom/* & fileapi/*}

Source/core/dom/Microtask.cpp

 /*
  * Copyright (C) 2013 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
@@ skipping 34 matching lines @@
     ASSERT(isolateData);
     if (isolateData->recursionLevel() || isolateData->performingMicrotaskCheckpoint())
         return;
     isolateData->setPerformingMicrotaskCheckpoint(true);
     isolate->RunMicrotasks();
     isolateData->setPerformingMicrotaskCheckpoint(false);
 }
 
 static void microtaskFunctionCallback(void* data)
 {
-    OwnPtr<blink::WebThread::Task> task = adoptPtr(static_cast<blink::WebThread::Task*>(data));
+    OwnPtr<WebThread::Task> task = adoptPtr(static_cast<WebThread::Task*>(data));
     task->run();
 }
 
-void Microtask::enqueueMicrotask(PassOwnPtr<blink::WebThread::Task> callback)
+void Microtask::enqueueMicrotask(PassOwnPtr<WebThread::Task> callback)
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     isolate->EnqueueMicrotask(&microtaskFunctionCallback, callback.leakPtr());
 }
 
 void Microtask::enqueueMicrotask(const Closure& callback)
 {
     enqueueMicrotask(adoptPtr(new Task(callback)));
 }
 
 } // namespace blink