cc: Use a normal texture for background texture.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 3286 matching lines @@
   switch (bitmap.GetFormat()) {
     case UIResourceBitmap::RGBA8:
       break;
     case UIResourceBitmap::ALPHA_8:
       format = ALPHA_8;
       break;
     case UIResourceBitmap::ETC1:
       format = ETC1;
       break;
   }
-  id = resource_provider_->CreateResource(
-      bitmap.GetSize(),
-      wrap_mode,
-      ResourceProvider::TextureUsageAny,
-      format);
+  id =
+      resource_provider_->CreateResource(bitmap.GetSize(),
+                                         wrap_mode,
+                                         ResourceProvider::TextureHintImmutable,
+                                         format);
 
   UIResourceData data;
   data.resource_id = id;
   data.size = bitmap.GetSize();
   data.opaque = bitmap.GetOpaque();
 
   ui_resource_map_[uid] = data;
 
   AutoLockUIResourceBitmap bitmap_lock(bitmap);
   resource_provider_->SetPixels(id,
@@ skipping 90 matching lines @@
 }
 
 void LayerTreeHostImpl::UnregisterPictureLayerImpl(PictureLayerImpl* layer) {
   std::vector<PictureLayerImpl*>::iterator it =
       std::find(picture_layers_.begin(), picture_layers_.end(), layer);
   DCHECK(it != picture_layers_.end());
   picture_layers_.erase(it);
 }
 
 }  // namespace cc