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..5971a6b0482a92ef0d5cd683a3166d92e5af5b4b 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 +38,30 @@ enum class InstanceBootPhase {
   // Last enum entry for IPC_ENUM_TRAITS
   LAST = BOOT_COMPLETED
 };
-}
+
+// Duplicates ui::ScaleFactor enum in order to be accessible on Android side.
+enum ScaleFactor : int {

[khmel1, 2015/12/02 00:31:46]

I also will add a unit test at
chrome/browser/ui/app_list/arc/arc_app_unittest.cc
'ScaleFactorUpToData' that validates its correctness. I am not doing it here to
avoid additional dependencies from components/arc to ui/

[yoshiki, 2015/12/03 02:24:32]

It might be better to use "enum class" instead.

[khmel1, 2015/12/03 03:53:27]

I would keep this one-to-one as they are originally declared for consistency (if
no rule to force to do differently).

+  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 {
+  std::string name;
+  std::string package;
+  std::string activity;
+};
+
+}  // namespace arc
 
 #endif  // COMPONENTS_ARC_COMMON_MESSAGE_TYPES