cc: Remove now-unused impl-side painting function

cc/picture_layer_tiling_set.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/picture_layer_tiling_set.h"
 
 namespace cc {
 
 PictureLayerTilingSet::PictureLayerTilingSet(
     PictureLayerTilingClient * client)
@@ skipping 33 matching lines @@
     return;
   layer_bounds_ = layer_bounds;
   for (size_t i = 0; i < tilings_.size(); ++i)
     tilings_[i]->SetLayerBounds(layer_bounds);
 }
 
 gfx::Size PictureLayerTilingSet::LayerBounds() const {
   return layer_bounds_;
 }
 
-void PictureLayerTilingSet::Invalidate(const Region& invalidation) {
-  if (invalidation.IsEmpty())
-    return;
-
-  for (size_t i = 0; i < tilings_.size(); ++i)
-    tilings_[i]->Invalidate(invalidation);
-}
-
 const PictureLayerTiling* PictureLayerTilingSet::AddTiling(
     float contents_scale,
     gfx::Size tile_size) {
   tilings_.append(PictureLayerTiling::Create(contents_scale, tile_size));
   tilings_.last()->SetClient(client_);
   tilings_.last()->SetLayerBounds(layer_bounds_);
   return tilings_.last();
 }
 
 void PictureLayerTilingSet::Reset() {
@@ skipping 124 matching lines @@
         device_viewport,
         layer_content_scale_x,
         layer_content_scale_y,
         last_screen_transform,
         current_screen_transform,
         time_delta);
   }
 }
 
 }  // namespace cc