Revert of Move collectGarbage* methods to ThreadState

third_party/WebKit/Source/platform/heap/RunAllTests.cpp

 /*
  * Copyright (C) 2014 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 34 matching lines @@
     }
     ~BlinkTestEnvironmentScope()
     {
         content::TearDownBlinkTestEnvironment();
     }
 };
 
 int runHelper(base::TestSuite* testSuite)
 {
     BlinkTestEnvironmentScope blinkTestEnvironment;
-    blink::ThreadState* currentThreadState = blink::ThreadState::current();
-    currentThreadState->registerTraceDOMWrappers(nullptr, nullptr, nullptr, nullptr);
+    blink::ThreadState::current()->registerTraceDOMWrappers(nullptr, nullptr, nullptr, nullptr);
     int result = testSuite->Run();
-    currentThreadState->collectAllGarbage();
+    blink::ThreadHeap::collectAllGarbage();
     return result;
 }
 
 int main(int argc, char** argv)
 {
     base::TestSuite testSuite(argc, argv);
     return base::LaunchUnitTests(argc, argv, base::Bind(runHelper, base::Unretained(&testSuite)));
 }