Remove the acclerated overflow scroll and fixed root background flags.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 6c129b82ab3d111b777a6159d318eed0ebfa3d69..3ecca0a02a43f1e65e2faaaa3e77466e72bc3488 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -81,15 +81,6 @@ const char kDisable3DAPIs[]                 = "disable-3d-apis";
 // Disable gpu-accelerated 2d canvas.
 const char kDisableAccelerated2dCanvas[]    = "disable-accelerated-2d-canvas";
 
-// Disables accelerated compositing for backgrounds of root layers with
-// background-attachment: fixed.
-const char kDisableAcceleratedFixedRootBackground[] =
-    "disable-accelerated-fixed-root-background";
-
-// Disables accelerated compositing for overflow scroll.
-const char kDisableAcceleratedOverflowScroll[] =
-    "disable-accelerated-overflow-scroll";
-
 // Disables layer squashing.
 const char kDisableLayerSquashing[] =
     "disable-layer-squashing";
@@ -283,16 +274,6 @@ const char kEnableBleedingEdgeRenderingFastPaths[] =
 // Disable deferred image filters.
 const char kDisableDeferredFilters[]         = "disable-deferred-filters";
 
-// Enables accelerated compositing for backgrounds of root layers with
-// background-attachment: fixed.
-const char kEnableAcceleratedFixedRootBackground[] =
-    "enable-accelerated-fixed-root-background";
-
-// Enables accelerated compositing for overflow scroll. Promotes eligible
-// overflow:scroll elements to layers to enable accelerated scrolling for them.
-const char kEnableAcceleratedOverflowScroll[] =
-    "enable-accelerated-overflow-scroll";
-
 // Enables LCD text.
 const char kEnableLCDText[]                 = "enable-lcd-text";