Makes Env contain a ContextFactory

ui/aura/env.cc

 // Copyright (c) 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 "ui/aura/env.h"
 
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "ui/aura/env_observer.h"
 #include "ui/aura/input_state_lookup.h"
@@ skipping 48 matching lines @@
   return input_state_lookup_.get() ? input_state_lookup_->IsMouseButtonDown() :
       mouse_button_flags_ != 0;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Env, private:
 
 Env::Env()
     : mouse_button_flags_(0),
       is_touch_down_(false),
-      input_state_lookup_(InputStateLookup::Create().Pass()) {
+      input_state_lookup_(InputStateLookup::Create().Pass()),
+      context_factory_(NULL) {
   DCHECK(lazy_tls_ptr.Pointer()->Get() == NULL);
   lazy_tls_ptr.Pointer()->Set(this);
 }
 
 Env::~Env() {
   FOR_EACH_OBSERVER(EnvObserver, observers_, OnWillDestroyEnv());
   DCHECK_EQ(this, lazy_tls_ptr.Pointer()->Get());
   lazy_tls_ptr.Pointer()->Set(NULL);
 }
 
@@ skipping 33 matching lines @@
 scoped_ptr<ui::EventTargetIterator> Env::GetChildIterator() const {
   return scoped_ptr<ui::EventTargetIterator>();
 }
 
 ui::EventTargeter* Env::GetEventTargeter() {
   NOTREACHED();
   return NULL;
 }
 
 }  // namespace aura