arc-app-launcher: Minimal support for ARC app launcher.

chromeos/arc/bridge/common/arc_instance_messages.h

Index: chromeos/arc/bridge/common/arc_instance_messages.h
diff --git a/chromeos/arc/bridge/common/arc_instance_messages.h b/chromeos/arc/bridge/common/arc_instance_messages.h
index 607718d12842306f1cdc1f27b0b3cd95471719ce..c7037e424e7612568672ed75a6439ed6b72d2b43 100644
--- a/chromeos/arc/bridge/common/arc_instance_messages.h
+++ b/chromeos/arc/bridge/common/arc_instance_messages.h
@@ -8,8 +8,13 @@
 #include <stdint.h>
 
 #include "base/file_descriptor_posix.h"
+#include "chromeos/chromeos_export.h"
 #include "ipc/ipc_message_macros.h"
 
+// Export IPC messages.
+#undef IPC_MESSAGE_EXPORT
+#define IPC_MESSAGE_EXPORT CHROMEOS_EXPORT
+
 #define IPC_MESSAGE_START ArcInstanceMsgStart
 
 // Registers a virtual input device on the container side.
@@ -22,3 +27,17 @@ IPC_MESSAGE_CONTROL3(ArcInstanceMsg_RegisterInputDevice,
                      std::string, /* name */
                      std::string, /* device_type */
                      base::FileDescriptor /* fd */)
+
+// Request to app launcher to refresh a list of available apps.
+IPC_MESSAGE_CONTROL0(ArcInstanceMsg_RefreshApps)
+
+// Request to app launcher to start an activity.
+IPC_MESSAGE_CONTROL2(ArcInstanceMsg_LaunchApp,
+                     std::string, /* package */
+                     std::string /* activity */)
+
+// Request to app launcher to send an app icon of a required scale factor.
+IPC_MESSAGE_CONTROL3(ArcInstanceMsg_RequestIcon,
+                     std::string, /* package */
+                     std::string, /* activity */
+                     int /* scale factor */)