register voice interaction preference.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index cc393e19151ce9b47d05119361cd30b2041fdf85..1cdf70efa03c385017f8e815dc948eb765f33a94 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -63,6 +63,12 @@ const char kVoiceInteractionEnabled[] = "settings.voice_interaction.enabled";
 // voice interaction services.
 const char kVoiceInteractionContextEnabled[] =
     "settings.voice_interaction.context.enabled";
+

[Luis Héctor Chávez, 2017/07/10 16:53:02]

nit: remove blank line

[Muyuan, 2017/07/14 20:52:14]

Done.

+// A preference indicating whether voice interaction settings should be read

[stevenjb, 2017/07/10 17:57:07]

s/should be/have been/ ?

[Muyuan, 2017/07/14 20:52:14]

Done.

+// from Arc. This synchronization only happens when user goes through the flow

[Luis Héctor Chávez, 2017/07/10 16:53:03]

nit: s/Arc/ARC/

[Muyuan, 2017/07/14 20:52:14]

Done.

+// to set up voice interaction.
+const char kVoiceInteractionPrefSynced[] =
+    "settings.voice_interaction.context.synced";
 #endif
 
 // A bool pref that keeps whether the child status for this profile was already