Set keyboard mic effect if available.

content/test/webrtc_content_browsertest_base.h

 // 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 "content/public/test/content_browser_test.h"
 
 namespace base {
 class CommandLine;
 }
 
 namespace content {
 
 // Contains stuff WebRTC browsertests have in common.
 class WebRtcContentBrowserTest: public ContentBrowserTest {
  public:
   virtual void SetUpCommandLine(base::CommandLine* command_line) OVERRIDE;
   virtual void SetUp() OVERRIDE;
+  virtual void TearDown() OVERRIDE;
 
  protected:
   // Executes |javascript|. The script is required to use
   // window.domAutomationController.send to send a string value back to here.
   std::string ExecuteJavascriptAndReturnResult(
       const std::string& javascript);
 
   // Waits for the javascript to return OK via the automation controller.
   // If the javascript returns != OK or times out, we fail the test.
   void ExecuteJavascriptAndWaitForOk(const std::string& javascript);
 
   void DisableOpusIfOnAndroid();
 
   // Generates javascript code for a getUserMedia call.
   std::string GenerateGetUserMediaCall(const char* function_name,
                                        int min_width,
                                        int max_width,
                                        int min_height,
                                        int max_height,
                                        int min_frame_rate,
                                        int max_frame_rate) const;
 };
 
 }  // namespace content