Add --disable-low-res-tiling. Disable low res tiling to save power.

cc/base/switches.h

 // 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.
 
 // Defines all the "cc" command-line switches.
 
 #ifndef CC_BASE_SWITCHES_H_
 #define CC_BASE_SWITCHES_H_
 
 #include "cc/base/cc_export.h"
 
 // Since cc is used from the render process, anything that goes here also needs
 // to be added to render_process_host_impl.cc.
 
 namespace cc {
 namespace switches {
 
 // Switches for the renderer compositor only.
+CC_EXPORT extern const char kDisableLowResTiling[];
 CC_EXPORT extern const char kDisableThreadedAnimation[];
 CC_EXPORT extern const char kDisableCompositedAntialiasing[];
 CC_EXPORT extern const char kEnableTopControlsPositionCalculation[];
+CC_EXPORT extern const char kEnableLowResTiling[];
 CC_EXPORT extern const char kJankInsteadOfCheckerboard[];
 CC_EXPORT extern const char kTopControlsHeight[];
 CC_EXPORT extern const char kTopControlsHideThreshold[];
 CC_EXPORT extern const char kTraceOverdraw[];
 CC_EXPORT extern const char kTopControlsShowThreshold[];
 CC_EXPORT extern const char kSlowDownRasterScaleFactor[];
 CC_EXPORT extern const char kCompositeToMailbox[];
 CC_EXPORT extern const char kMaxTilesForInterestArea[];
 CC_EXPORT extern const char kMaxUnusedResourceMemoryUsagePercentage[];
 CC_EXPORT extern const char kEnablePinchVirtualViewport[];
@@ skipping 21 matching lines @@
 CC_EXPORT extern const char kUIShowReplicaScreenSpaceRects[];
 CC_EXPORT extern const char kShowOccludingRects[];
 CC_EXPORT extern const char kUIShowOccludingRects[];
 CC_EXPORT extern const char kShowNonOccludingRects[];
 CC_EXPORT extern const char kUIShowNonOccludingRects[];
 
 // Unit test related.
 CC_EXPORT extern const char kCCLayerTreeTestNoTimeout[];
 CC_EXPORT extern const char kCCRebaselinePixeltests[];
 
+CC_EXPORT bool IsLowResTilingEnabled();
+
 }  // namespace switches
 }  // namespace cc
 
 #endif  // CC_BASE_SWITCHES_H_