Add IPC messages for ARC notification

components/arc/common/arc_host_messages.h

Index: components/arc/common/arc_host_messages.h
diff --git a/components/arc/common/arc_host_messages.h b/components/arc/common/arc_host_messages.h
index 116de0cce2b05582ce52d856229d562f858f42b5..f1519920d1713f1f276940b6f5cd9162a7f50ee2 100644
--- a/components/arc/common/arc_host_messages.h
+++ b/components/arc/common/arc_host_messages.h
@@ -7,7 +7,9 @@
 
 #include "ipc/ipc_message_macros.h"
 
-#include "components/arc/common/arc_message_types.h"
+// Using relative paths since this file is shared between chromium and android.
+#include "arc_message_types.h"
+#include "arc_notification_types.h"
 
 #define IPC_MESSAGE_START ArcInstanceHostMsgStart
 
@@ -15,3 +17,32 @@ IPC_ENUM_TRAITS_MAX_VALUE(arc::InstanceBootPhase, arc::InstanceBootPhase::LAST)
 
 IPC_MESSAGE_CONTROL1(ArcInstanceHostMsg_InstanceBootPhase,
                      arc::InstanceBootPhase)
+
+// Enum for notification type.
+IPC_ENUM_TRAITS_MAX_VALUE(arc::ArcNotificationType,
+                          arc::ArcNotificationType::NOTIFICATION_TYPE_LAST)
+
+// Struct for notification data.
+IPC_STRUCT_TRAITS_BEGIN(arc::ArcNotificationData)
+  IPC_STRUCT_TRAITS_MEMBER(key)
+  IPC_STRUCT_TRAITS_MEMBER(type)
+  IPC_STRUCT_TRAITS_MEMBER(message)
+  IPC_STRUCT_TRAITS_MEMBER(title)
+  IPC_STRUCT_TRAITS_MEMBER(icon_mimetype)
+  IPC_STRUCT_TRAITS_MEMBER(icon_data)
+  IPC_STRUCT_TRAITS_MEMBER(priority)
+  IPC_STRUCT_TRAITS_MEMBER(timestamp)
+  IPC_STRUCT_TRAITS_MEMBER(progress_current)
+  IPC_STRUCT_TRAITS_MEMBER(progress_max)
+IPC_STRUCT_TRAITS_END()
+
+// Tells the Chrome that a notification is posted (created or updated) on
+// Android.
+// |notification_data| is the data of notification (id, texts, icon and ...).
+IPC_MESSAGE_CONTROL1(ArcInstanceHostMsg_NotificationPosted,
+                     arc::ArcNotificationData /* notification_data */);
+
+// Notifies that a notification is removed on Android.
+// |key| is the identifier of the notification.
+IPC_MESSAGE_CONTROL1(ArcInstanceHostMsg_NotificationRemoved,
+                     std::string /* key */);