Add audible, muted to Tab, c.t.query, c.t.update, and c.t.onUpdated where relevant

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc

 // Copyright (c) 2012 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 "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "chrome/browser/extensions/extension_apitest.h"
@@ skipping 23 matching lines @@
 
 const char kExtensionId[] = "ddchlicdkolnonkihahngkmmmjnjlkkf";
 
 class TabCaptureApiTest : public ExtensionApiTest {
  public:
   void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     // Specify smallish window size to make testing of tab capture less CPU
     // intensive.
     command_line->AppendSwitchASCII(::switches::kWindowSize, "300,300");
+    command_line->AppendSwitch(::switches::kEnableTabAudioMuting);

[not at google - send to devlin, 2015/05/26 23:09:46]

What does this flag actually control? E.g. if the call
"chrome::SetTabAudioMuted" fails if it's off, then we should include as part of
the API that it fails, rather than silently failing. I'll comment in the place.

[Jared Sohn, 2015/05/27 14:52:01]

Addressed elsewhere.

   }
 
   void AddExtensionToCommandLineWhitelist() {
     base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kWhitelistedExtensionID, kExtensionId);
   }
 
  protected:
   void SimulateMouseClickInCurrentTab() {
     content::SimulateMouseClick(
@@ skipping 300 matching lines @@
       return;
     }
     content::RunMessageLoop();
   }
   browser()->tab_strip_model()->RemoveObserver(&observer);
 }
 
 }  // namespace
 
 }  // namespace extensions