cc : Fix damage rect bug caused by deletion of render surface

cc/layers/texture_layer_unittest.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/layers/texture_layer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1199 matching lines @@
         texture_layer_->SetNeedsDisplay();
         // Force a change to make sure we draw a frame.
         solid_layer_->SetBackgroundColor(SK_ColorGRAY);
         break;
       case 3:
         // Layer shouldn't have been updated.
         EXPECT_EQ(1, prepare_called_);
         // So the old mailbox isn't returned yet.
         EXPECT_EQ(0, mailbox_returned_);
         // Make layer visible again.
-        parent_layer_->SetOpacity(1.f);
+        parent_layer_->SetOpacity(0.9f);
         break;
       case 4:
         // Layer should have been updated.
         EXPECT_EQ(2, prepare_called_);
         // So the old mailbox should have been returned already.
         EXPECT_EQ(1, mailbox_returned_);
         texture_layer_->ClearClient();
         break;
       case 5:
         EXPECT_EQ(2, mailbox_returned_);
@@ skipping 252 matching lines @@
   int callback_count_;
   scoped_refptr<Layer> root_;
   scoped_refptr<TextureLayer> layer_;
 };
 
 SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(
     TextureLayerWithMailboxImplThreadDeleted);
 
 }  // namespace
 }  // namespace cc