[cc] Rename all cc/ filenames to Chromium style

cc/content_layer_client.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 ContentLayerChromiumClient_h
+#define ContentLayerChromiumClient_h
+
+class SkCanvas;
+
+namespace cc {
+class FloatRect;
+class IntRect;
+
+class ContentLayerChromiumClient {
+public:
+    virtual void paintContents(SkCanvas*, const IntRect& clip, FloatRect& opaque) = 0;
+
+protected:
+    virtual ~ContentLayerChromiumClient() { }
+};
+
+}
+
+#endif // ContentLayerChromiumClient_h