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

cc/base/switches.h

Index: cc/base/switches.h
diff --git a/cc/base/switches.h b/cc/base/switches.h
index 689f0e99b6ee286f0bac24ebea9043b724df09a1..19f381f89801e0d2da555746626d8ecf8fe3b6cf 100644
--- a/cc/base/switches.h
+++ b/cc/base/switches.h
@@ -20,12 +20,14 @@ CC_EXPORT extern const char kBackgroundColorInsteadOfCheckerboard[];
 CC_EXPORT extern const char kDisableLCDText[];
 CC_EXPORT extern const char kDisableGPURasterization[];
 CC_EXPORT extern const char kDisableImplSidePainting[];
+CC_EXPORT extern const char kDisableLowResTiling[];
 CC_EXPORT extern const char kDisableThreadedAnimation[];
 CC_EXPORT extern const char kDisableCompositedAntialiasing[];
 CC_EXPORT extern const char kEnableLCDText[];
 CC_EXPORT extern const char kEnableImplSidePainting[];
 CC_EXPORT extern const char kEnableTopControlsPositionCalculation[];
 CC_EXPORT extern const char kEnableGPURasterization[];
+CC_EXPORT extern const char kEnableLowResTiling[];
 CC_EXPORT extern const char kJankInsteadOfCheckerboard[];
 CC_EXPORT extern const char kTopControlsHeight[];
 CC_EXPORT extern const char kTopControlsHideThreshold[];
@@ -72,6 +74,7 @@ CC_EXPORT extern const char kCCRebaselinePixeltests[];
 
 CC_EXPORT bool IsLCDTextEnabled();
 CC_EXPORT bool IsGpuRasterizationEnabled();
+CC_EXPORT bool IsLowResTilingEnabled();
 CC_EXPORT bool IsImplSidePaintingEnabled();
 CC_EXPORT bool IsMapImageEnabled();