Revert of Add enablePerThreadHeap flag to ThreadState

third_party/WebKit/Source/platform/WebThreadSupportingGC.h

Index: third_party/WebKit/Source/platform/WebThreadSupportingGC.h
diff --git a/third_party/WebKit/Source/platform/WebThreadSupportingGC.h b/third_party/WebKit/Source/platform/WebThreadSupportingGC.h
index b64835bac67538a6995d560799297027e2824b24..32ea91a4ae037f8cfa9aceaf2c9839bf73a5d257 100644
--- a/third_party/WebKit/Source/platform/WebThreadSupportingGC.h
+++ b/third_party/WebKit/Source/platform/WebThreadSupportingGC.h
@@ -29,8 +29,8 @@
     USING_FAST_MALLOC(WebThreadSupportingGC);
     WTF_MAKE_NONCOPYABLE(WebThreadSupportingGC);
 public:
-    static PassOwnPtr<WebThreadSupportingGC> create(const char* name, bool perThreadHeapEnabled = false);
-    static PassOwnPtr<WebThreadSupportingGC> createForThread(WebThread*, bool perThreadHeapEnabled = false);
+    static PassOwnPtr<WebThreadSupportingGC> create(const char* name);
+    static PassOwnPtr<WebThreadSupportingGC> createForThread(WebThread*);
     ~WebThreadSupportingGC();
 
     void postTask(const WebTraceLocation& location, PassOwnPtr<SameThreadClosure> task)
@@ -78,7 +78,7 @@
     }
 
 private:
-    WebThreadSupportingGC(const char* name, WebThread*, bool perThreadHeapEnabled);
+    WebThreadSupportingGC(const char* name, WebThread*);
 
     OwnPtr<GCTaskRunner> m_gcTaskRunner;
 
@@ -87,7 +87,6 @@
     // existing thread via createForThread().
     WebThread* m_thread = nullptr;
     OwnPtr<WebThread> m_owningThread;
-    bool m_perThreadHeapEnabled;
 };
 
 } // namespace blink