Enable Stage3D on Chrome OS

It seems to be working now that the drivers have been updated.

BUG=163229


Review URL: https://chromiumcodereview.appspot.com/11412263

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170652 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/gpu/software_rendering_list.json

@@ -74,7 +74,7 @@
 {
   "name": "software rendering list",
   // Please update the version number whenever you change this file.
-  "version": "4.6",
+  "version": "4.7",
   "entries": [
     {
       "id": 1,
@@ -523,17 +523,6 @@
         "flash_stage3d"
       ]
     },
-    {
-      "id": 36,
-      "description": "Stage3D is not supported on ChromeOS.",
-      "cr_bugs": [129848],
-      "os": {
-        "type": "chromeos"
-      },
-      "blacklist": [
-        "flash_stage3d"
-      ]
-    },
     {
       "id": 37,
       "description": "Drivers are unreliable for Optimus on Linux.",