Revert 283229 "content: Enable impl-side painting on Windows."

Some PDF tests have been crashing on windows in skpicturerecord.

https://code.google.com/p/chromium/issues/detail?id=394267

Seeing if this fixes it. If not, we try the skia roll.

> content: Enable impl-side painting on Windows.
> 
> BUG=169282
> 
> Review URL: https://codereview.chromium.org/392623003

TBR=reveman@chromium.org

Review URL: https://codereview.chromium.org/392333002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283406 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/gpu/compositor_util.cc

@@ -230,7 +230,7 @@ bool IsImplSidePaintingEnabled() {
       switches::kEnableBleedingEdgeRenderingFastPaths))
     return true;
 
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) || defined(OS_WIN)
   return false;
 #else
   return IsThreadedCompositingEnabled();