arc-bridge: Restart ARC instance on crash

components/arc/arc_bridge_bootstrap.cc

Index: components/arc/arc_bridge_bootstrap.cc
diff --git a/components/arc/arc_bridge_bootstrap.cc b/components/arc/arc_bridge_bootstrap.cc
index 493a8dba39c374ca289d0c701bbb53c5f3dac8e3..a0a86d9738c991db42473a093398bca243a3329a 100644
--- a/components/arc/arc_bridge_bootstrap.cc
+++ b/components/arc/arc_bridge_bootstrap.cc
@@ -56,6 +56,8 @@ class ArcBridgeBootstrapImpl : public ArcBridgeBootstrap {
   // STOPPING
   //   StopInstance() ->
   // STOPPED
+  //
+  // When the instance crashes, it will be stopped and restarted.

[hidehiko, 2015/12/29 13:27:11]

Clarification: In this case, the state would be changed to

(any) -> STOPPING -> STOPPED

then, -> SOCKET_CREATING -> ... -> READY, right?
Could you kindly briefly note that the state will be changed during the restart,
too?

[Luis Héctor Chávez, 2015/12/29 17:17:36]

Done.

   enum class State {
     // ARC is not currently running.
     STOPPED,