Define a --force-gpu-rasterization flag

cc/base/switches.h

Index: cc/base/switches.h
diff --git a/cc/base/switches.h b/cc/base/switches.h
index 689f0e99b6ee286f0bac24ebea9043b724df09a1..5e3057c227dac92eaf313035eca423f4e13593c2 100644
--- a/cc/base/switches.h
+++ b/cc/base/switches.h
@@ -17,15 +17,9 @@ namespace switches {
 
 // Switches for the renderer compositor only.
 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 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 kJankInsteadOfCheckerboard[];
 CC_EXPORT extern const char kTopControlsHeight[];
 CC_EXPORT extern const char kTopControlsHideThreshold[];
@@ -37,8 +31,6 @@ CC_EXPORT extern const char kMaxTilesForInterestArea[];
 CC_EXPORT extern const char kMaxUnusedResourceMemoryUsagePercentage[];
 CC_EXPORT extern const char kEnablePinchVirtualViewport[];
 CC_EXPORT extern const char kStrictLayerPropertyChangeChecking[];
-CC_EXPORT extern const char kEnableMapImage[];
-CC_EXPORT extern const char kDisableMapImage[];
 CC_EXPORT extern const char kDisable4444Textures[];
 CC_EXPORT extern const char kDisableCompositorTouchHitTesting[];
 
@@ -70,11 +62,6 @@ CC_EXPORT extern const char kUIShowNonOccludingRects[];
 CC_EXPORT extern const char kCCLayerTreeTestNoTimeout[];
 CC_EXPORT extern const char kCCRebaselinePixeltests[];
 
-CC_EXPORT bool IsLCDTextEnabled();
-CC_EXPORT bool IsGpuRasterizationEnabled();
-CC_EXPORT bool IsImplSidePaintingEnabled();
-CC_EXPORT bool IsMapImageEnabled();
-
 }  // namespace switches
 }  // namespace cc