Revert of 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 af98bb1bee3a629026111de63436e2cca84febde..b2e00606e7ea1ca5ad7636ac5d63bec4541f91c9 100644
--- a/components/arc/common/arc_bridge.mojom
+++ b/components/arc/common/arc_bridge.mojom
@@ -4,40 +4,274 @@
 
 module arc;
 
-import "app.mojom";
-import "input.mojom";
-import "notifications.mojom";
-import "power.mojom";
-import "process.mojom";
-import "settings.mojom";
-
+// 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,
+
+  // 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 {
-  // Keep the entries alphabetical. In order to do so without breaking
-  // compatibility with the ARC instance, explicitly assign each interface a
-  // unique ordinal.
-
-  // Notifies Chrome that the AppInstance interface is ready.
-  OnAppInstanceReady@100(AppInstance instance_ptr);
-
-  // Notifies Chrome that the InputInstnace interface is ready.
-  OnInputInstanceReady@101(InputInstance instance_ptr);
-
-  // Notifies Chrome that the NotificationsInstance interface is ready.
-  OnNotificationsInstanceReady@102(NotificationsInstance instance_ptr);
-
-  // Notifies Chrome that the PowerInstance interface is ready.
-  OnPowerInstanceReady@103(PowerInstance instance_ptr);
-
-  // Notifies Chrome that the ProcessInstance interface is ready.
-  OnProcessInstanceReady@104(ProcessInstance instance_ptr);
-
-  // Notifies Chrome that the SettingsInstance interface is ready.
-  OnSettingsInstanceReady@105(SettingsInstance instance_ptr);
+  OnInstanceBootPhase(InstanceBootPhase phase);
+
+  // 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);
+
+  // 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);
+
+  // 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 that a notification is removed on Android.
+  // |key| is the identifier of the notification.
+  OnNotificationRemoved(string key);
+
+  // Acquire and release wake locks on the host side.
+  OnAcquireDisplayWakeLock(DisplayWakeLockType type);
+  OnReleaseDisplayWakeLock(DisplayWakeLockType type);
+
+  // Notifies Chrome that the ARC process list has been updated.
+  OnUpdateProcessList(array<RunningAppProcessInfo> processes);
 };
 
 interface ArcBridgeInstance {
   // Establishes full-duplex communication with the host.
-  // |host_ptr| is the MessagePipe endpoint that is bound to the
-  // ArcBridgeHostPtr binding.
-  Init@0(ArcBridgeHost host_ptr);
-};
+  // |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);
+};