stop using deprecated SkBitmap::Config -- use SkColorType instead

BUG=skia:2239
NOTRY=True

TBR=pfeldman@chromium.org

only failing trybot is mac_rel:telemetry_perfm, which has been failing for a while now. This CL is not related to that area, so skipping that try to land it.

Review URL: https://codereview.chromium.org/191333002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255788 0039d316-1c4b-4281-b951-d872f2087c98

content/shell/renderer/webkit_test_runner.cc

@@ -115,7 +115,7 @@ void MakeBitmapOpaque(SkBitmap* bitmap) {
 void CopyCanvasToBitmap(SkCanvas* canvas,  SkBitmap* snapshot) {
   SkBaseDevice* device = skia::GetTopDevice(*canvas);
   const SkBitmap& bitmap = device->accessBitmap(false);
-  const bool success = bitmap.copyTo(snapshot, SkBitmap::kARGB_8888_Config);
+  const bool success = bitmap.copyTo(snapshot, kPMColor_SkColorType);
   DCHECK(success);
 
 #if !defined(OS_MACOSX)