cc: Remove cc::Thread and cc::ThreadImpl.

cc/test/fake_proxy.h

Index: cc/test/fake_proxy.h
diff --git a/cc/test/fake_proxy.h b/cc/test/fake_proxy.h
index b806df425a3c4f1e9314308682dfa2c8201142ca..3f7df449c20d720a423b94049352d4562b25a982 100644
--- a/cc/test/fake_proxy.h
+++ b/cc/test/fake_proxy.h
@@ -5,7 +5,7 @@
 #ifndef CC_TEST_FAKE_PROXY_H_
 #define CC_TEST_FAKE_PROXY_H_
 
-#include "cc/base/thread.h"
+#include "base/single_thread_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/proxy.h"
 
@@ -13,8 +13,10 @@ namespace cc {
 
 class FakeProxy : public Proxy {
  public:
-  explicit FakeProxy(scoped_ptr<Thread> impl_thread)
-      : Proxy(impl_thread.Pass()),
+  FakeProxy() : Proxy(NULL), layer_tree_host_(NULL) {}
+  explicit FakeProxy(
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
+      : Proxy(impl_task_runner),
         layer_tree_host_(NULL) {}
 
   void SetLayerTreeHost(LayerTreeHost* host);