cc: Remove use of PassAs() and constructor-casting with scoped_ptr.

cc/resources/resource_provider.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/resources/resource_provider.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/containers/hash_tables.h"
@@ skipping 1084 matching lines @@
   DCHECK(gl);
 #if DCHECK_IS_ON
   // Check that all GL resources has been deleted.
   for (ResourceMap::const_iterator itr = resources_.begin();
        itr != resources_.end();
        ++itr) {
     DCHECK_NE(GLTexture, itr->second.type);
   }
 #endif  // DCHECK_IS_ON
 
-  texture_uploader_.reset();
-  texture_id_allocator_.reset();
-  buffer_id_allocator_.reset();
+  texture_uploader_ = nullptr;
+  texture_id_allocator_ = nullptr;
+  buffer_id_allocator_ = nullptr;
   gl->Finish();
 }
 
 int ResourceProvider::CreateChild(const ReturnCallback& return_callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   Child child_info;
   child_info.return_callback = return_callback;
 
   int child = next_child_++;
@@ skipping 955 matching lines @@
   ContextProvider* context_provider = output_surface_->context_provider();
   return context_provider ? context_provider->ContextGL() : NULL;
 }
 
 class GrContext* ResourceProvider::GrContext() const {
   ContextProvider* context_provider = output_surface_->context_provider();
   return context_provider ? context_provider->GrContext() : NULL;
 }
 
 }  // namespace cc