Remove unused WebThread based code for workers

content/child/blink_platform_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
 #include "base/threading/thread_local_storage.h"
@@ skipping 130 matching lines @@
   virtual void stopSharedTimer();
   virtual void callOnMainThread(void (*func)(void*), void* context);
   virtual blink::WebGestureCurve* createFlingAnimationCurve(
       blink::WebGestureDevice device_source,
       const blink::WebFloatPoint& velocity,
       const blink::WebSize& cumulative_scroll) OVERRIDE;
   virtual void didStartWorkerRunLoop(
       const blink::WebWorkerRunLoop& runLoop) OVERRIDE;
   virtual void didStopWorkerRunLoop(
       const blink::WebWorkerRunLoop& runLoop) OVERRIDE;
-  virtual void didStartWorkerThread(
-      blink::WebThread* thread);
-  virtual void didStopWorkerThread(
-      blink::WebThread* thread);
   virtual blink::WebCrypto* crypto() OVERRIDE;
 
   void SetFlingCurveParameters(const std::vector<float>& new_touchpad,
                                const std::vector<float>& new_touchscreen);
 
   void SuspendSharedTimer();
   void ResumeSharedTimer();
   virtual void OnStartSharedTimer(base::TimeDelta delay) {}
 
  private:
@@ skipping 13 matching lines @@
   bool shared_timer_fire_time_was_set_while_suspended_;
   int shared_timer_suspended_;  // counter
   scoped_ptr<FlingCurveConfiguration> fling_curve_configuration_;
   base::ThreadLocalStorage::Slot current_thread_slot_;
   WebCryptoImpl web_crypto_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_