cc: Use a normal texture for background texture.

cc/layers/texture_layer_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/layers/texture_layer_impl.h"
 
 #include <vector>
 
 #include "base/strings/stringprintf.h"
 #include "cc/output/renderer.h"
@@ skipping 85 matching lines @@
     // Have to upload a copy to a texture for it to be used in a
     // hardware draw.
     if (!texture_copy_)
       texture_copy_ = ScopedResource::Create(resource_provider);
     if (texture_copy_->size() != texture_mailbox_.shared_memory_size() ||
         resource_provider->InUseByConsumer(texture_copy_->id()))
       texture_copy_->Free();
 
     if (!texture_copy_->id()) {
       texture_copy_->Allocate(texture_mailbox_.shared_memory_size(),
-                              ResourceProvider::TextureUsageAny,
+                              ResourceProvider::TextureHintImmutable,
                               resource_provider->best_texture_format());
     }
 
     if (texture_copy_->id()) {
       std::vector<uint8> swizzled;
       uint8* pixels =
           static_cast<uint8*>(texture_mailbox_.shared_memory()->memory());
 
       if (!PlatformColor::SameComponentOrder(texture_copy_->format())) {
         // Swizzle colors. This is slow, but should be really uncommon.
@@ skipping 130 matching lines @@
   } else if (external_texture_resource_) {
     DCHECK(!own_mailbox_);
     ResourceProvider* resource_provider =
         layer_tree_impl()->resource_provider();
     resource_provider->DeleteResource(external_texture_resource_);
     external_texture_resource_ = 0;
   }
 }
 
 }  // namespace cc