Remove static thread pointers from CC

cc/layer_impl.cc

 // Copyright 2011 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.
 
 #include "config.h"
 
 #include "CCLayerImpl.h"
 
 #include "CCDebugBorderDrawQuad.h"
 #include "CCLayerSorter.h"
@@ skipping 41 matching lines @@
     , m_drawOpacityIsAnimating(false)
     , m_debugBorderColor(0)
     , m_debugBorderWidth(0)
     , m_drawTransformIsAnimating(false)
     , m_screenSpaceTransformIsAnimating(false)
 #ifndef NDEBUG
     , m_betweenWillDrawAndDidDraw(false)
 #endif
     , m_layerAnimationController(CCLayerAnimationController::create(this))
 {
-    DCHECK(CCProxy::isImplThread());
     DCHECK(m_layerId > 0);
 }
 
 CCLayerImpl::~CCLayerImpl()
 {
-    DCHECK(CCProxy::isImplThread());
 #ifndef NDEBUG
     DCHECK(!m_betweenWillDrawAndDidDraw);
 #endif
 }
 
 void CCLayerImpl::addChild(scoped_ptr<CCLayerImpl> child)
 {
     child->setParent(this);
     m_children.append(child.Pass());
 }
@@ skipping 592 matching lines @@
 
 void CCLayerImpl::setVerticalScrollbarLayer(CCScrollbarLayerImpl* scrollbarLayer)
 {
     if (!m_scrollbarAnimationController)
         m_scrollbarAnimationController = CCScrollbarAnimationController::create(this);
     m_scrollbarAnimationController->setVerticalScrollbarLayer(scrollbarLayer);
     m_scrollbarAnimationController->updateScrollOffset(this);
 }
 
 }