Enable device orientation by default.

chrome/renderer/render_thread.cc

 // Copyright (c) 2010 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 "chrome/renderer/render_thread.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 925 matching lines @@
 
   WebRuntimeFeatures::enablePushState(true);
 
   WebRuntimeFeatures::enableTouch(
       command_line.HasSwitch(switches::kEnableTouch));
 
   WebRuntimeFeatures::enableDeviceMotion(
       command_line.HasSwitch(switches::kEnableDeviceMotion));
 
   WebRuntimeFeatures::enableDeviceOrientation(
-      command_line.HasSwitch(switches::kEnableDeviceOrientation));
+      !command_line.HasSwitch(switches::kDisableDeviceOrientation));
 
   WebRuntimeFeatures::enableSpeechInput(
       command_line.HasSwitch(switches::kEnableSpeechInput));
 }
 
 void RenderThread::IdleHandler() {
 #if (defined(OS_WIN) || defined(OS_LINUX)) && defined(USE_TCMALLOC)
   MallocExtension::instance()->ReleaseFreeMemory();
 #endif
 
@@ skipping 148 matching lines @@
 
 scoped_refptr<base::MessageLoopProxy>
 RenderThread::GetFileThreadMessageLoopProxy() {
   DCHECK(message_loop() == MessageLoop::current());
   if (!file_thread_.get()) {
     file_thread_.reset(new base::Thread("Renderer::FILE"));
     file_thread_->Start();
   }
   return file_thread_->message_loop_proxy();
 }