[cc] Trace detailed tile info when --trace-all-rendered-frames

cc/proxy.h

Index: cc/proxy.h
diff --git a/cc/proxy.h b/cc/proxy.h
index f84a3f3e2ccb0ee273a7f419252a23169318b9e5..3a18b01eceb4e406d5c223868293f2fc69cda4c2 100644
--- a/cc/proxy.h
+++ b/cc/proxy.h
@@ -9,6 +9,7 @@
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
+#include "base/values.h"
 #include "cc/cc_export.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkPicture.h"
@@ -99,6 +100,7 @@ public:
     virtual void acquireLayerTextures() = 0;
 
     virtual skia::RefPtr<SkPicture> capturePicture() = 0;
+    virtual scoped_ptr<base::Value> asValue() const = 0;
 
     // Testing hooks
     virtual bool commitPendingForTesting() = 0;