register voice interaction preference.

components/arc/common/voice_interaction_framework.mojom

Index: components/arc/common/voice_interaction_framework.mojom
diff --git a/components/arc/common/voice_interaction_framework.mojom b/components/arc/common/voice_interaction_framework.mojom
index c5129a6ad80e8675e04465d81871547914df12a7..7fffd15664678e65e6fab00ba7120bd8da3e5050 100644
--- a/components/arc/common/voice_interaction_framework.mojom
+++ b/components/arc/common/voice_interaction_framework.mojom
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Next MinVersion: 7
+// Next MinVersion: 8
 
 module arc.mojom;
 
@@ -31,7 +31,7 @@ interface VoiceInteractionFrameworkHost {
 };
 
 // Connects with Android system server.
-// Next method ID: 7
+// Next method ID: 8
 interface VoiceInteractionFrameworkInstance {
   Init@0(VoiceInteractionFrameworkHost host_ptr);
 
@@ -55,4 +55,8 @@ interface VoiceInteractionFrameworkInstance {
 
   // Starts the voice interaction setup wizard in container.
   [MinVersion=5] StartVoiceInteractionSetupWizard@6();
-};
+
+  // Queries voice interaction settings status.
+  [MinVersion=7] GetVoiceInteractionSettings@7() 
+    => (bool defined, bool voice_interaction, bool context);

[dcheng, 2017/07/06 23:30:34]

1) Please explain what |defined|, |voice_interaction|, and |context| mean in
comments.

2) How would you feel about using a simple mojo struct to return these values?
Seeing three bools at the call site is pretty opaque (and it'd be easy to mix up
parameters by accident)

[Muyuan, 2017/07/07 19:02:56]

Done.

+};