Convert most of extensions and some other random stuff to using the base namespace for Values.

cc/resources/tile_manager.h

Index: cc/resources/tile_manager.h
diff --git a/cc/resources/tile_manager.h b/cc/resources/tile_manager.h
index ff788ae8acfb154d2cb54682c55267a711022938..ef8ccfb2f21142bbbf18a1ba91db822195f2ce27 100644
--- a/cc/resources/tile_manager.h
+++ b/cc/resources/tile_manager.h
@@ -142,7 +142,7 @@ class CC_EXPORT TileManager : public RasterWorkerPoolClient {
   void DidTileTreeBinChange(Tile* tile,
                             TileManagerBin new_tree_bin,
                             WhichTree tree);
-  scoped_ptr<Value> GetMemoryRequirementsAsValue() const;
+  scoped_ptr<base::Value> GetMemoryRequirementsAsValue() const;
   void AddRequiredTileForActivation(Tile* tile);
 
   TileManagerClient* client_;