Enable SetShape on stable channel.

The SetAlphaShape bugs have been fixed:
* HiDPI Shape: crrev.com/394193003
* Null Shape: crrev.com/456943004

BUG=324071,374440

Review URL: https://codereview.chromium.org/453173002

Cr-Commit-Position: refs/heads/master@{#289147}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289147 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/api/_permission_features.json

@@ -72,56 +72,6 @@
     "channel": "stable",
     "extension_types": ["platform_app"]
   },
-  "app.window.shape": [
-    {
-      "channel": "beta",
-      "extension_types": ["platform_app"]
-    },
-    {
-      "channel": "stable",
-      "extension_types": ["platform_app"],
-      "whitelist": [
-        "0F42756099D914A026DADFA182871C015735DD95",  // http://crbug.com/323773
-        "2D22CDB6583FD0A13758AEBE8B15E45208B4E9A7",
-        "E7E2461CE072DF036CF9592740196159E2D7C089",  // http://crbug.com/356200
-        "A74A4D44C7CFCD8844830E6140C8D763E12DD8F3",
-        "312745D9BF916161191143F6490085EEA0434997",
-        "53041A2FA309EECED01FFC751E7399186E860B2C",
-        "EBA908206905323CECE6DC4B276A58A0F4AC573F",
-        "2775E568AC98F9578791F1EAB65A1BF5F8CEF414",
-        "4AA3C5D69A4AECBD236CAD7884502209F0F5C169",
-        "E410CDAB2C6E6DD408D731016CECF2444000A912",
-        "9E930B2B5EABA6243AE6C710F126E54688E8FAF6",
-        "FAFE8EFDD2D6AE2EEB277AFEB91C870C79064D9E",  // http://crbug.com/327507
-        "3B52D273A271D4E2348233E322426DBAE854B567",
-        "5DF6ADC8708DF59FCFDDBF16AFBFB451380C2059",
-        "1037DEF5F6B06EA46153AD87B6C5C37440E3F2D1",
-        "F5815DAFEB8C53B078DD1853B2059E087C42F139",
-        "6A08EFFF9C16E090D6DCC7EC55A01CADAE840513",
-        "C32D6D93E12F5401DAA3A723E0C3CC5F25429BA4",  // http://crbug.com/354258
-        "9099782647D39C778E15C8C6E0D23C88F5CDE170",
-        "B7D5B52D1E5B106288BD7F278CAFA5E8D76108B0",
-        "89349DBAA2C4022FB244AA50182AB60934EB41EE",
-        "CB593E510640572A995CB1B6D41BD85ED51E63F8",
-        "1AD1AC86C87969CD3434FA08D99DBA6840AEA612",
-        "9C2EA21D7975BDF2B3C01C3A454EE44854067A6D",
-        "D2C488C80C3C90C3E01A991112A05E37831E17D0",
-        "6EEC061C0E74B46C7B5BE2EEFA49436368F4988F",
-        "8B344D9E8A4C505EF82A0DBBC25B8BD1F984E777",
-        "E06AFCB1EB0EFD237824CC4AC8FDD3D43E8BC868",
-        "F76F43EFFF56BF17A9868A5243F339BA28746632",  // http://crbug.com/386324
-        "C6EA52B92F80878515F94137020F01519357E5B5",
-        "E466389F058ABD73FF6FDD06F768A351FCBF8532",
-        "40063F1CF7B68BA847A26FA6620DDF156171D23C",
-        "A6FD8E15353CF1F5C3D0A7B20E1D10AEA4DD3E6A",
-        "57AC4D9E6BD8A2D0A70056B5FAC2378CAA588912",
-        "02037314DA4D913640DCF0E296A7D01F4FD793EC",
-        "B6EC0809BC63E10B431C5E4AA3645232CA86B2A5",
-        "48CA541313139786F056DBCB504A1025CFF5D2E3",
-        "05106136AE7F08A3C181D4648E5438350B1D2B4F"
-      ]
-    }
-  ],
   "app.window.alpha": [
     {
       "channel": "dev",
@@ -140,6 +90,10 @@
       ]
     }
   ],
+  "app.window.shape": {
+    "channel": "stable",
+    "extension_types": ["platform_app"]
+  },
   "audio": [
     {
       "channel": "dev",