[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 7cb4bec83352281234a5d0c247a323e8aede0c10..bfc9be98d9f0aada0fe40a141fc189b19471abd1 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"
 
@@ -33,6 +34,17 @@ void Tile::set_priority(WhichTree tree, const TilePriority& priority) {
   priority_[tree] = priority;
 }
 
+scoped_ptr<base::Value> Tile::AsValue() const {
+  scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
+  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>();
+}
+
 ResourceProvider::ResourceId Tile::GetResourceId() const {
   if (!managed_state_.resource)
     return 0;