Remove static thread pointers from CC

cc/texture_update_controller.cc

Index: cc/texture_update_controller.cc
diff --git a/cc/texture_update_controller.cc b/cc/texture_update_controller.cc
index b0f1ccbb811238fc761412b27ec68bd26de71fa1..ff66246735f715de372435c7db3d5c993e2fdc30 100644
--- a/cc/texture_update_controller.cc
+++ b/cc/texture_update_controller.cc
@@ -8,7 +8,6 @@
 
 #include "base/debug/trace_event.h"
 #include "cc/prioritized_texture.h"
-#include "cc/proxy.h"
 #include "cc/resource_provider.h"
 #include "cc/texture_copier.h"
 #include "third_party/khronos/GLES2/gl2.h"
@@ -70,8 +69,9 @@ size_t TextureUpdateController::maxFullUpdatesPerTick(
     return texturesPerTick ? texturesPerTick : 1;
 }
 
-TextureUpdateController::TextureUpdateController(TextureUpdateControllerClient* client, Thread* thread, scoped_ptr<TextureUpdateQueue> queue, ResourceProvider* resourceProvider)
+TextureUpdateController::TextureUpdateController(TextureUpdateControllerClient* client, Thread* thread, scoped_ptr<TextureUpdateQueue> queue, ResourceProvider* resourceProvider, bool hasImplThread)
     : m_client(client)
+    , m_hasImplThread(hasImplThread)
     , m_timer(new Timer(thread, this))
     , m_queue(queue.Pass())
     , m_resourceProvider(resourceProvider)
@@ -126,10 +126,10 @@ void TextureUpdateController::updateTexture(ResourceUpdate update)
         DCHECK(m_resourceProvider->resourceType(texture->resourceId()) ==
                ResourceProvider::GLTexture);
 
-        WebGraphicsContext3D* paintContext = Proxy::hasImplThread() ?
+        WebGraphicsContext3D* paintContext = m_hasImplThread ?
             WebSharedGraphicsContext3D::compositorThreadContext() :
             WebSharedGraphicsContext3D::mainThreadContext();
-        GrContext* paintGrContext = Proxy::hasImplThread() ?
+        GrContext* paintGrContext = m_hasImplThread ?
             WebSharedGraphicsContext3D::compositorThreadGrContext() :
             WebSharedGraphicsContext3D::mainThreadGrContext();