arc-bridge: Implement IPC message for app launcher

components/arc/common/arc_message_types.h

Index: components/arc/common/arc_message_types.h
diff --git a/components/arc/common/arc_message_types.h b/components/arc/common/arc_message_types.h
index e07193d628dff6f8a5448226c568185de44be506..cb1b464234403639d5068706a6f97128e401f024 100644
--- a/components/arc/common/arc_message_types.h
+++ b/components/arc/common/arc_message_types.h
@@ -5,7 +5,10 @@
 #ifndef COMPONENTS_ARC_COMMON_MESSAGE_TYPES
 #define COMPONENTS_ARC_COMMON_MESSAGE_TYPES
 
+#include <string>
+
 namespace arc {
+
 // Describing the boot phase of the ARC instance, as defined by AOSP in
 // com.android.server.SystemService
 enum class InstanceBootPhase {
@@ -35,6 +38,14 @@ enum class InstanceBootPhase {
   // Last enum entry for IPC_ENUM_TRAITS
   LAST = BOOT_COMPLETED
 };
-}
+
+// Describes ARC app.
+struct AppInfo {
+  std::string name;
+  std::string package;
+  std::string activity;
+};
+
+}  // namespace arc
 
 #endif  // COMPONENTS_ARC_COMMON_MESSAGE_TYPES