cc: Add CompositorFrame class with IPC param traits for it

cc/compositor_frame_ack.cc

Index: cc/compositor_frame_ack.cc
diff --git a/cc/renderer.cc b/cc/compositor_frame_ack.cc
similarity index 54%
copy from cc/renderer.cc
copy to cc/compositor_frame_ack.cc
index 50f07a34eef88ecca63f292a29237bf0b5271f2b..2709c0f953ea01c8f29a06d4204915ed7cad1102 100644
--- a/cc/renderer.cc
+++ b/cc/compositor_frame_ack.cc
@@ -2,18 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "cc/renderer.h"
+#include "cc/compositor_frame_ack.h"
 
 namespace cc {
 
-bool Renderer::haveCachedResourcesForRenderPassId(RenderPass::Id) const
-{
-    return false;
-}
+CompositorFrameAck::CompositorFrameAck() {}
 
-bool Renderer::isContextLost()
-{
-    return false;
-}
+CompositorFrameAck::~CompositorFrameAck() {}
 
 }  // namespace cc