Move chrome.fileSystem interface and bindings to //extensions

extensions/common/api/_permission_features.json

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This features file defines permissions for extension APIs implemented
 // under src/extensions.
 // See chrome/common/extensions/api/_features.md to understand this file, as
 // well as feature.h, simple_feature.h, and feature_provider.h.
 
 // If you add a new platform_app permission please update the "stubs_app" test:
@@ skipping 207 matching lines @@
     "channel": "stable",
     "extension_types": [
       "extension", "hosted_app", "legacy_packaged_app", "platform_app"
     ],
     "whitelist": [
       "54ECAB4579BDE8FDAF9B29ED335F9946EE504A52",  // Used in unit tests
       "E24F1786D842E91E74C27929B0B3715A4689A473",  // http://crbug.com/417494
       "A28C9619C4C41306FA5236FB4D94DA812F504DE8"   // http://crbug.com/429886
     ]
   },
+  "fileSystem": [{
+    "channel": "stable",
+    "extension_types": ["platform_app"],
+    "default_parent": true
+  },{
+    "channel": "stable",
+    "extension_types": ["extension"],
+    "whitelist": [
+      "2FC374607C2DF285634B67C64A2E356C607091C3",  // Quickoffice
+      "3727DD3E564B6055387425027AD74C58784ACC15",  // Quickoffice internal
+      "12E618C3C6E97495AAECF2AC12DEB082353241C6",  // QO component extension
+      "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2",  // http://crbug.com/312900
+      "D57DE394F36DC1C3220E7604C575D29C51A6C495",  // http://crbug.com/319444
+      "3F65507A3B39259B38C8173C6FFA3D12DF64CCE9",  // http://crbug.com/371562
+      "2B6C6A4A5940017146F3E58B7F90116206E84685",  // http://crbug.com/642141
+      "B6C2EFAB3EC3BF6EF03701408B6B09A67B2D0069",  // http://crbug.com/642141
+      "96FF2FFA5C9173C76D47184B3E86D267B37781DE",  // http://crbug.com/642141
+      "0136FCB13DB29FD5CD442F56E59E53B61F1DF96F"   // http://crbug.com/642141
+    ]
+  }],
+  "fileSystem.directory": {
+    "channel": "stable",
+    "extension_types": ["platform_app"]

[michaelpg, 2017/06/13 23:19:26]

Devlin, why are these fields necessary when the default_parent in fileSystem has
the same fileds?

[Devlin, 2017/06/14 14:56:18]

They aren't.  Kill them! :)

Optionally, you could do this in a separate CL (either before or after this one)
just in case something breaks (though nothing should).

[michaelpg, 2017/06/26 18:07:19]

Will do. There's enough custom stuff here that I'll submit it as a separate CL.

+  },
+  "fileSystem.retainEntries": {
+    "channel": "stable",
+    "extension_types": ["platform_app"]
+  },
+  "fileSystem.write": [{
+    "channel": "stable",
+    "extension_types": ["platform_app"]

[Devlin, 2017/06/14 14:56:18]

note that this one *is* necessary, since otherwise the QO exception would cause
fileSystem.write to only be available to extension contexts.

+  },{
+    "channel": "stable",
+    "extension_types": ["extension"],
+    "whitelist": [
+      "2FC374607C2DF285634B67C64A2E356C607091C3",  // Quickoffice
+      "3727DD3E564B6055387425027AD74C58784ACC15",  // Quickoffice internal
+      "12E618C3C6E97495AAECF2AC12DEB082353241C6",  // QO component extension
+      "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2",  // http://crbug.com/312900
+      "D57DE394F36DC1C3220E7604C575D29C51A6C495",  // http://crbug.com/319444
+      "3F65507A3B39259B38C8173C6FFA3D12DF64CCE9"   // http://crbug.com/371562
+    ]
+  }],
+  "fileSystem.requestFileSystem": {
+    "channel": "stable",
+    "extension_types": ["platform_app"],
+    "platforms": ["chromeos"]
+  },
   "hid": [
     {
       "channel": "stable",
       "extension_types": ["platform_app"]
     },
     {
       "channel": "stable",
       "extension_types": ["extension"],
       "whitelist": [
         "496B6890097EB6E19809ADEADD095A8721FBB2E0",  // FIDO U2F APIs
@@ skipping 371 matching lines @@
   }],
   "webRequest": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
    },
   "webRequestBlocking": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   }
 }