Fix remaining cc files to compile with Clang

cc/test/FakeCCLayerTreeHostClient.h

 // Copyright 2012 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 FakeCCLayerTreeHostClient_h
 #define FakeCCLayerTreeHostClient_h
 
 #include "config.h"
 
 #include "CCInputHandler.h"
 #include "CCLayerTreeHost.h"
 #include "CompositorFakeWebGraphicsContext3D.h"
 #include "FakeWebCompositorOutputSurface.h"
 
 namespace cc {
 
 class FakeCCLayerTreeHostClient : public CCLayerTreeHostClient {
 public:
     virtual void willBeginFrame() OVERRIDE { }
     virtual void didBeginFrame() OVERRIDE { }
     virtual void animate(double monotonicFrameBeginTime) OVERRIDE { }
     virtual void layout() OVERRIDE { }
     virtual void applyScrollAndScale(const IntSize& scrollDelta, float pageScale) OVERRIDE { }
 
-    virtual PassOwnPtr<WebKit::WebCompositorOutputSurface> createOutputSurface() OVERRIDE
-    {
-        WebKit::WebGraphicsContext3D::Attributes attrs;
-        return WebKit::FakeWebCompositorOutputSurface::create(WebKit::CompositorFakeWebGraphicsContext3D::create(attrs));
-    }
+    virtual PassOwnPtr<WebKit::WebCompositorOutputSurface> createOutputSurface() OVERRIDE;
     virtual void didRecreateOutputSurface(bool success) OVERRIDE { }
-    virtual PassOwnPtr<CCInputHandler> createInputHandler() OVERRIDE { return nullptr; }
+    virtual PassOwnPtr<CCInputHandler> createInputHandler() OVERRIDE;
     virtual void willCommit() OVERRIDE { }
     virtual void didCommit() OVERRIDE { }
     virtual void didCommitAndDrawFrame() OVERRIDE { }
     virtual void didCompleteSwapBuffers() OVERRIDE { }
 
     // Used only in the single-threaded path.
     virtual void scheduleComposite() OVERRIDE { }
 };
 
 }
 #endif // FakeCCLayerTreeHostClient_h