Stop playing/recording when not needed.

chrome/browser/copresence/chrome_whispernet_client_browsertest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/copresence/chrome_whispernet_client.h"
 
 #include <cstdlib>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 119 matching lines @@
       const std::string& token,
       bool audible,
       const scoped_refptr<media::AudioBusRefCounted>& samples) {
     EXPECT_EQ(expected_token_, token);
     EXPECT_EQ(expected_audible_, audible);
     saved_samples_ = samples;
     ASSERT_TRUE(run_loop_);
     run_loop_->Quit();
   }
 
-  void TokensCallback(const std::vector<copresence::FullToken>& tokens) {
+  void TokensCallback(const std::vector<copresence::AudioToken>& tokens) {
     ASSERT_TRUE(run_loop_);
     run_loop_->Quit();
 
     EXPECT_EQ(expected_token_, tokens[0].token);
     EXPECT_EQ(expected_audible_, tokens[0].audible);
   }
 
   void DetectBroadcastCallback(bool success) {
     EXPECT_TRUE(success);
     ASSERT_TRUE(run_loop_);
@@ skipping 33 matching lines @@
   EncodeTokenAndSaveSamples(false);
   DecodeSamplesAndVerifyToken(false);
   DetectBroadcast();
 }
 
 IN_PROC_BROWSER_TEST_F(ChromeWhispernetClientTest, Audible) {
   InitializeWhispernet();
   EncodeTokenAndSaveSamples(true);
   DecodeSamplesAndVerifyToken(true);
 }