Added option to enable accelerated drawing to about:flags.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
===================================================================
--- chrome/browser/about_flags.cc	(revision 112044)
+++ chrome/browser/about_flags.cc	(working copy)
@@ -152,6 +152,13 @@
     SINGLE_VALUE_TYPE(switches::kShowCompositedLayerBorders)
   },
   {
+    "accelerated-drawing",
+    IDS_FLAGS_ACCELERATED_DRAWING_NAME,
+    IDS_FLAGS_ACCELERATED_DRAWING_DESCRIPTION,
+    kOsWin | kOsLinux | kOsCrOS,  // Not available on Mac until it uses Skia.

[vangelis, 2011/12/01 06:06:25]

Can kOsMac be added within the guard that controls SKIA usage on the mac so that
we don't have to change it once we switch?

+    SINGLE_VALUE_TYPE(switches::kEnableAcceleratedDrawing)
+  },
+  {
     "show-fps-counter",
     IDS_FLAGS_SHOW_FPS_COUNTER,
     IDS_FLAGS_SHOW_FPS_COUNTER_DESCRIPTION,