TextureLayer: clear texture id when clearing client

cc/layers/texture_layer.cc

 // Copyright 2010 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/layers/texture_layer.h"
 
 #include "cc/base/thread.h"
 #include "cc/layers/texture_layer_client.h"
 #include "cc/layers/texture_layer_impl.h"
 #include "cc/trees/layer_tree_host.h"
@@ skipping 46 matching lines @@
   if (layer_tree_host()) {
     if (texture_id_)
       layer_tree_host()->AcquireLayerTextures();
     if (rate_limit_context_ && client_)
       layer_tree_host()->StopRateLimiter(client_->Context3d());
   }
   if (own_mailbox_)
     texture_mailbox_.RunReleaseCallback(texture_mailbox_.sync_point());
 }
 
+void TextureLayer::ClearClient() {
+  client_ = NULL;
+  SetTextureId(0);
+}
+
 scoped_ptr<LayerImpl> TextureLayer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
   return TextureLayerImpl::Create(tree_impl, id(), uses_mailbox_).
       PassAs<LayerImpl>();
 }
 
 void TextureLayer::SetFlipped(bool flipped) {
   flipped_ = flipped;
   SetNeedsCommit();
 }
 
@@ skipping 118 matching lines @@
   // triple-buffered.  Single-buffered layers already prevent draws, so
   // can block too for simplicity.
   return DrawsContent();
 }
 
 bool TextureLayer::CanClipSelf() const {
   return true;
 }
 
 }  // namespace cc