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 cedb0413e366971740e26ab698afaab8c97b400b..46548b3e1b2c1aa2848f5e5d0af49464bccf6a3e 100644
--- a/cc/base/switches.h
+++ b/cc/base/switches.h
@@ -16,15 +16,9 @@ namespace cc {
 namespace switches {
 
 // Switches for the renderer compositor only.
-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[];
@@ -36,8 +30,6 @@ 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[];
 
@@ -69,11 +61,6 @@ 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