Add voice interaction pending support

BUG=b:62276007
TEST=locally build and flash, start voice interaction before arc ready

Change-Id: Ie8d3489f2d4f7b08830dbf7b384e67d0dfab537b
Reviewed-on: https://chromium-review.googlesource.com/575524
Commit-Queue: Xiaohui Chen <xiaohuic@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487565}

chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_framework_service.cc

@@ -234,6 +234,11 @@ void ArcVoiceInteractionFrameworkService::OnInstanceReady() {
   ash::Shell::Get()->accelerator_controller()->Register(
       {ui::Accelerator(ui::VKEY_A, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN)},
       this);
+
+  if (is_request_pending_) {
+    is_request_pending_ = false;
+    framework_instance->StartVoiceInteractionSession();
+  }
 }
 
 void ArcVoiceInteractionFrameworkService::OnInstanceClosed() {
@@ -444,6 +449,7 @@ void ArcVoiceInteractionFrameworkService::StartSessionFromUserInteraction(
 
   if (!arc_bridge_service_->voice_interaction_framework()->has_instance()) {
     SetArcCpuRestriction(false);
+    is_request_pending_ = true;
     return;
   }
 

chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_framework_service.h

@@ -115,6 +115,9 @@ class ArcVoiceInteractionFrameworkService
   base::Closure metalayer_closed_callback_;
   bool metalayer_enabled_ = false;
 
+  // Whether there is a pending request to start voice interaction.
+  bool is_request_pending_ = false;
+
   // The time when a user initated an interaction.
   base::TimeTicks user_interaction_start_time_;