Allow arc app to lock screen orientation in TouchView/Tablet mode

components/arc/common/app.mojom

 // Copyright 2015 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.
 //
-// Next MinVersion: 11
+// Next MinVersion: 12
 
 module arc.mojom;
 
 import "scale_factor.mojom";
 import "screen_rect.mojom";
 
+enum OrientationLock {

[Luis Héctor Chávez, 2016/06/30 23:01:47]

Do you envision adding more stuff to this enum? (Maybe upside-down to force no
rotation taking place?)

If so, add [Extensible]

[oshima, 2016/07/01 00:44:47]

I'm not sure, and since I'm not sure, I added it :)
Thank you for the suggestion!

+  NONE = 0,
+  PORTRAIT = 1,
+  LANDSCAPE = 2,
+};
+
 // Describes ARC app.
 struct AppInfo {
   string name;
   string package_name;
   string activity;
   [MinVersion=2] bool sticky;  // true if the app cannot be uninstalled
   [MinVersion=7] bool notifications_enabled;
+  [MinVersion=11] OrientationLock orientation_lock;
 };
 
 // Describes ARC package.
 struct ArcPackageInfo {
   string package_name;
   int32 package_version;
   int64 last_backup_android_id;
   int64 last_backup_time;
   bool sync;  // true if package installation should be synced
 };
 
 // Describes ARC app shortcut.
 struct ShortcutInfo {
   string name;
   string package_name;
   string icon_resource_id;
   string intent_uri;
 };
 
 // Page for ShowPackageInfoOnPage.
 [Extensible]
 enum ShowPackageInfoPage {
   // The main package info page.
   MAIN = 0,
 
   // Page for managing links assigned to the app.
   MANAGE_LINKS = 1,
 };
 
-// Next method ID: 12
+// Next method ID: 13
 interface AppHost {
   // Sends newly added ARC app to Chrome. This message is sent when ARC receives
   // package added notification. Multiple apps may be added in the one package.
   [MinVersion=1] OnAppAdded@2(AppInfo app);
 
   // Receives an icon of required |scale_factor| for specific ARC app. The app
   // is defined by |package_name| and |activity|. The icon content cannot be
   // empty and must match to |scale_factor| assuming 48x48 for
   // SCALE_FACTOR_100P.  |scale_factor| is an enum defined at ui/base/layout.h.
   // |icon_png_data| is a png-encoded image.
@@ skipping 29 matching lines @@
 
   // Notifies that task has been activated.
   [MinVersion=4] OnTaskSetActive@6(int32 task_id);
 
   // Notifies that notifications enabled settings in Android is changed.
   [MinVersion=7] OnNotificationsEnabledChanged@7(string package_name,
                                                  bool enabled);
 
   // Notifies that an application shortcut needs to be created.
   [MinVersion=9] OnInstallShortcut@11(ShortcutInfo shortcut);
+
+  // Notifies that task requested orientation lock.
+  [MinVersion=11] OnTaskOrientationLockRequested@12(int32 task_id,
+                                                    OrientationLock lock);
 };
 
 // TODO(lhchavez): Migrate all request/response messages to Mojo.
 // Next method ID: 16
 // Deprecated method ID: 9
 interface AppInstance {
   Init@0(AppHost host_ptr);
 
   // Query if a given resolution can be handled by the application. Returns true
   // if it can.
@@ skipping 56 matching lines @@
                                            ShowPackageInfoPage page,
                                            ScreenRect dimension_on_screen);
 
   // Sets notification setting for the package.
   [MinVersion=6] SetNotificationsEnabled@10(string package_name, bool enabled);
 
   // Sends a request to ARC to uninstall the given package.  Error (if ever
   // happens) is ignored, and uninstall option should appear in the UI.
   [MinVersion=2] UninstallPackage@5(string package_name);
 };