Revert of Enable GPU Raster on OSX

content/browser/gpu/compositor_util.cc

Index: content/browser/gpu/compositor_util.cc
diff --git a/content/browser/gpu/compositor_util.cc b/content/browser/gpu/compositor_util.cc
index ebb25eb4c8af6bfcab2c8f67d4627e1356ceb125..0df9c2d9a2dbea2234821bf497bacab432a8aa1c 100644
--- a/content/browser/gpu/compositor_util.cc
+++ b/content/browser/gpu/compositor_util.cc
@@ -229,12 +229,12 @@
     return false;
   }
 
-#if defined(OS_ANDROID) || defined(OS_MACOSX)
+#if defined(OS_ANDROID)
   return true;
 #endif
 
-  // explicitly disable GPU rasterization on all non-android and non-mac devices
-  // until we have full test coverage.
+  // explicitly disable GPU rasterization on all non-android devices until we
+  // have full test coverage.
   return false;
 }