Reland "arc-bridge: Move most methods to Mojo interfaces"

components/arc/common/arc_bridge.mojom

Index: components/arc/common/arc_bridge.mojom
diff --git a/components/arc/common/arc_bridge.mojom b/components/arc/common/arc_bridge.mojom
index b2e00606e7ea1ca5ad7636ac5d63bec4541f91c9..af98bb1bee3a629026111de63436e2cca84febde 100644
--- a/components/arc/common/arc_bridge.mojom
+++ b/components/arc/common/arc_bridge.mojom
@@ -4,274 +4,40 @@
 
 module arc;
 
-// Describes the boot phase of the ARC instance, as defined by AOSP in
-// com.android.server.SystemService
-enum InstanceBootPhase {
-  // Boot phase indicating that the instance is not running
-  NOT_RUNNING = 0,
+import "app.mojom";
+import "input.mojom";
+import "notifications.mojom";
+import "power.mojom";
+import "process.mojom";
+import "settings.mojom";
 
-  // After receiving this boot phase the ARC bridge is ready to receive
-  // IPC messages. This phase is ARC-specific.
-  BRIDGE_READY,
-
-  // After receiving this boot phase, services can safely call into core
-  // system services such as the PowerManager or PackageManager.
-  SYSTEM_SERVICES_READY,
-
-  // After receiving this boot phase, services can broadcast Intents.
-  ACTIVITY_MANAGER_READY,
-
-  // After receiving this boot phase, services can start/bind to third party
-  // apps. Apps will be able to make Binder calls into services at this point.
-  THIRD_PARTY_APPS_CAN_START,
-
-  // After receiving this boot phase, services can allow user interaction
-  // with the device. This phase occurs when boot has completed and the home
-  // application has started.
-  BOOT_COMPLETED
-};
-
-// Duplicates ui::ScaleFactor enum in order to be accessible on Android side.
-enum ScaleFactor {
-  SCALE_FACTOR_NONE = 0,
-  SCALE_FACTOR_100P,
-  SCALE_FACTOR_125P,
-  SCALE_FACTOR_133P,
-  SCALE_FACTOR_140P,
-  SCALE_FACTOR_150P,
-  SCALE_FACTOR_180P,
-  SCALE_FACTOR_200P,
-  SCALE_FACTOR_250P,
-  SCALE_FACTOR_300P,
-
-  NUM_SCALE_FACTORS
-};
-
-// Describes ARC app.
-struct AppInfo {
-  string name;
-  string package;
-  string activity;
-};
-
-// These values must be matched with the NOTIFICATION_EVENT_* constants in
-// com.android.server.ArcNotificationListenerService.
-enum ArcNotificationEvent {
-  BODY_CLICKED = 0,
-  CLOSED = 1,
-  // Five buttons at maximum (message_center::kNotificationMaximumItems = 5).
-  BUTTON1_CLICKED = 2,
-  BUTTON2_CLICKED = 3,
-  BUTTON3_CLICKED = 4,
-  BUTTON4_CLICKED = 5,
-  BUTTON5_CLICKED = 6,
-};
-
-// These values must be matched with the NOTIFICATION_TYPE_* constants in
-// com.android.server.ArcNotificationListenerService.
-enum ArcNotificationType {
-  BASIC = 0,
-  IMAGE = 1,
-  PROGRESS = 2,
-};
-
-// Enumerates the types of wake lock the ARC instance can request from the
-// host.
-enum DisplayWakeLockType {
-  // Does not allow the screen to dim, turn off, or lock; prevents
-  // idle suspend.
-  BRIGHT = 0,
-
-  // Allows dimming the screen, but prevents it from turning off or locking.
-  // Also prevents idle suspend.
-  DIM = 1
-};
-
-// Describes the current process state, as defined by AOSP in
-// android.app.ActivityManager.
-enum ProcessState {
-  // Process does not exist.
-  NONEXISTENT = -1,
-
-  // Process is a persistent system process.
-  PERSISTENT = 0,
-
-  // Process is a persistent system process and is doing UI.
-  PERSISTENT_UI = 1,
-
-  // Process is hosting the current top activities.  Note that this covers
-  // all activities that are visible to the user.
-  TOP = 2,
-
-  // Process is hosting a foreground service due to a system binding.
-  BOUND_FOREGROUND_SERVICE = 3,
-
-  // Process is hosting a foreground service.
-  FOREGROUND_SERVICE = 4,
-
-  // Same as PROCESS_STATE_TOP but while device is sleeping.
-  TOP_SLEEPING = 5,
-
-  // Process is important to the user, and something they are aware of.
-  IMPORTANT_FOREGROUND = 6,
-
-  // Process is important to the user, but not something they are aware of.
-  IMPORTANT_BACKGROUND = 7,
-
-  // Process is in the background running a backup/restore operation.
-  BACKUP = 8,
-
-  // Process is in the background, but it can't restore its state so we want
-  // to try to avoid killing it.
-  HEAVY_WEIGHT = 9,
-
-  // Process is in the background running a service.  Unlike oom_adj, this level
-  // is used for both the normal running in background state and the executing
-  // operations state.
-  SERVICE = 10,
-
-  // Process is in the background running a receiver.   Note that from the
-  // perspective of oom_adj receivers run at a higher foreground level, but for
-  // our prioritization here that is not necessary and putting them below
-  // services means many fewer changes in some process states as they receive
-  // broadcasts.
-  RECEIVER = 11,
-
-  // Process is in the background but hosts the home activity.
-  HOME = 12,
-
-  // Process is in the background but hosts the last shown activity.
-  LAST_ACTIVITY = 13,
-
-  // Process is being cached for later use and contains activities.
-  CACHED_ACTIVITY = 14,
-
-  // Process is being cached for later use and is a client of another cached
-  // process that contains activities.
-  CACHED_ACTIVITY_CLIENT = 15,
-
-  // Process is being cached for later use and is empty.
-  CACHED_EMPTY = 16,
-};
-
-struct ArcNotificationData {
-  // Identifier of notification
-  string key;
-  // Type of notification
-  ArcNotificationType type;
-  // Body message of notification
-  string message;
-  // Title of notification
-  string title;
-  // Mimetype of |icon_data|
-  string icon_mimetype;
-  // Binary data of the icon
-  array<uint8> icon_data;
-  // Priority of notification, must be [2,-2]
-  int32 priority;
-  // Timestamp related to the notification
-  int64 time;
-  // The current value of progress, must be [0, progress_max].
-  int32 progress_current;
-  // The maximum value of progress.
-  int32 progress_max;
-};
-
-// Describes a running ARC process.
-// This struct is a subset of android.app.ActivityManager.RunningAppProcessInfo.
-struct RunningAppProcessInfo {
-  // Name of the process.
-  string process_name;
-
-  // PID (within ARC's PID namespace) of the process.
-  uint32 pid;
-
-  // Current process state.
-  ProcessState process_state;
-};
-
-// TODO(lhchavez): Migrate all request/response messages to Mojo.
 interface ArcBridgeHost {
-  OnInstanceBootPhase(InstanceBootPhase phase);
+  // Keep the entries alphabetical. In order to do so without breaking
+  // compatibility with the ARC instance, explicitly assign each interface a
+  // unique ordinal.
 
-  // Sends a list of available ARC apps to Chrome. Members of AppInfo must
-  // contain non-empty string. This message is sent in response to
-  // ArcInstanceMsg_RefreshApps message from Chrome to ARC and when ARC
-  // receives boot completed notification.
-  OnAppListRefreshed(array<AppInfo> apps);
+  // Notifies Chrome that the AppInstance interface is ready.
+  OnAppInstanceReady@100(AppInstance instance_ptr);
 
-  // Sends an icon of required |scale_factor| for specific ARC app. The app is
-  // defined by |package| 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. This message is
-  // sent in response to ArcInstanceMsg_RequestIcon from Chrome to ARC.
-  OnAppIcon(string package, string activity, ScaleFactor scale_factor,
-            array<uint8> icon_png_data);
+  // Notifies Chrome that the InputInstnace interface is ready.
+  OnInputInstanceReady@101(InputInstance instance_ptr);
 
-  // Tells the Chrome that a notification is posted (created or updated) on
-  // Android.
-  // |notification_data| is the data of notification (id, texts, icon and ...).
-  OnNotificationPosted(ArcNotificationData notification_data);
+  // Notifies Chrome that the NotificationsInstance interface is ready.
+  OnNotificationsInstanceReady@102(NotificationsInstance instance_ptr);
 
-  // Notifies that a notification is removed on Android.
-  // |key| is the identifier of the notification.
-  OnNotificationRemoved(string key);
+  // Notifies Chrome that the PowerInstance interface is ready.
+  OnPowerInstanceReady@103(PowerInstance instance_ptr);
 
-  // Acquire and release wake locks on the host side.
-  OnAcquireDisplayWakeLock(DisplayWakeLockType type);
-  OnReleaseDisplayWakeLock(DisplayWakeLockType type);
+  // Notifies Chrome that the ProcessInstance interface is ready.
+  OnProcessInstanceReady@104(ProcessInstance instance_ptr);
 
-  // Notifies Chrome that the ARC process list has been updated.
-  OnUpdateProcessList(array<RunningAppProcessInfo> processes);
+  // Notifies Chrome that the SettingsInstance interface is ready.
+  OnSettingsInstanceReady@105(SettingsInstance instance_ptr);
 };
 
 interface ArcBridgeInstance {
   // Establishes full-duplex communication with the host.
-  // |pipe| is the MessagePipe endpoint that is bound to the ArcBridgeHostPtr
-  // binding.
-  Init(ArcBridgeHost host_ptr);
-
-  // Registers a virtual input device on the container side.
-  // |name| is the device name, like "Chrome OS Keyboard".
-  // |device_type| is the device type, like "keyboard".
-  // The virtual device will be reading 'struct input_event's from |fd|.  The
-  // ownership of |fd| will be transferred to the receiver, so the sender must
-  // not close it.
-  RegisterInputDevice(string name,
-                      string device_type,
-                      handle fd);
-
-  // Sends a request to ARC to refresh a list of ARC apps.
-  // OnRefreshAppsList is expected in response to this message. However,
-  // response may not be sent if ARC is not ready yet (boot completed event is
-  // not received).
-  RefreshAppList();
-
-  // Sends a request to ARC to launch an ARC app defined by |package| and
-  // |activity|, which cannot be empty.
-  LaunchApp(string package, string activity);
-
-  // Sends a request to ARC for the ARC app icon of a required scale factor.
-  // Scale factor is an enum defined at ui/base/layout.h. App is defined by
-  // package and activity, which cannot be empty.
-  RequestAppIcon(string package, string activity,
-                 ScaleFactor scale_factor);
-
-  // Sends an event from Chrome notification UI to Android.
-  // |event| is a type of occured event.
-  SendNotificationEventToAndroid(string key, ArcNotificationEvent event);
-
-  // Requests ARC instance to return the current process list.
-  RequestProcessList();
-
-  // Send an Android broadcast message to the Android package and class
-  // specified.  Data can be sent as extras by including a JSON map string which
-  // will be automatically converted to a bundle accessible by the receiver.
-  //
-  // Note: Broadcasts can only be sent to whitelisted packages.  Packages can be
-  // added to the whitelist in ArcBridgeService.java in the Android source.
-  SendBroadcast(string action,
-                string package,
-                string cls,
-                string extras);
+  // |host_ptr| is the MessagePipe endpoint that is bound to the
+  // ArcBridgeHostPtr binding.
+  Init@0(ArcBridgeHost host_ptr);
 };