Remove static thread pointers from CC

cc/resource_provider_unittest.cc

Index: cc/resource_provider_unittest.cc
diff --git a/cc/resource_provider_unittest.cc b/cc/resource_provider_unittest.cc
index 493991b647fdd46fea0bd68c578edcfb6f42c6a5..815b13af2b8ebe06f31fa454e19798e14b4bd35d 100644
--- a/cc/resource_provider_unittest.cc
+++ b/cc/resource_provider_unittest.cc
@@ -10,7 +10,7 @@
 #include "cc/graphics_context.h"
 #include "cc/scoped_ptr_deque.h"
 #include "cc/scoped_ptr_hash_map.h"
-#include "cc/single_thread_proxy.h" // For DebugScopedSetImplThread
+#include "cc/stubs/int_rect.h"
 #include "cc/test/compositor_fake_web_graphics_context_3d.h"
 #include "cc/test/fake_web_compositor_output_surface.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -300,7 +300,6 @@ public:
     }
 
 protected:
-    DebugScopedSetImplThread implThread;
     scoped_ptr<ContextSharedData> m_sharedData;
     scoped_ptr<GraphicsContext> m_context;
     scoped_ptr<ResourceProvider> m_resourceProvider;