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

cc/tile.cc

Index: cc/tile.cc
diff --git a/cc/tile.cc b/cc/tile.cc
index bc07dccfa85a6ad0dab561bfb2f6f0b7c9521a88..ae2396fb803c01e208405775f5265df2eebe0400 100644
--- a/cc/tile.cc
+++ b/cc/tile.cc
@@ -4,6 +4,7 @@
 
 #include "cc/tile.h"
 
+#include "base/stringprintf.h"
 #include "cc/tile_manager.h"
 #include "third_party/khronos/GLES2/gl2.h"
 
@@ -28,4 +29,16 @@ Tile::~Tile() {
   tile_manager_->UnregisterTile(this);
 }
 
+scoped_ptr<base::Value> Tile::AsValue() const {
+  scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
+  res->SetString("id", base::StringPrintf("%p", this));
+  res->SetString("picture_pile", base::StringPrintf("%p",
+                                                    picture_pile_.get()));
+  res->SetDouble("contents_scale", contents_scale_);
+  res->Set("priority.0", priority_[ACTIVE_TREE].AsValue().release());
+  res->Set("priority.1", priority_[PENDING_TREE].AsValue().release());
+  res->Set("managed_state", managed_state_.AsValue().release());
+  return res.PassAs<base::Value>();
+}
+
 }  // namespace cc