Reland of name kDisableGestureRequirementForMediaPlayback and make it a test-only flag.

content/shell/app/shell_main_delegate.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 "content/shell/app/shell_main_delegate.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/cpu.h"
 #include "base/files/file.h"
@@ skipping 163 matching lines @@
       command_line.AppendSwitchASCII(
           switches::kUseGL,
           gl::GetGLImplementationName(gl::GetSoftwareGLImplementation()));
     }
     command_line.AppendSwitch(switches::kSkipGpuDataLoading);
     command_line.AppendSwitchASCII(
         switches::kTouchEventFeatureDetection,
         switches::kTouchEventFeatureDetectionEnabled);
     if (!command_line.HasSwitch(switches::kForceDeviceScaleFactor))
       command_line.AppendSwitchASCII(switches::kForceDeviceScaleFactor, "1.0");
-    command_line.AppendSwitch(
-        switches::kDisableGestureRequirementForMediaPlayback);
+    command_line.AppendSwitch(switches::kIgnoreAutoplayRestrictionsForTests);
 
     if (!command_line.HasSwitch(switches::kStableReleaseMode)) {
       command_line.AppendSwitch(
         switches::kEnableExperimentalWebPlatformFeatures);
     }
 
     if (!command_line.HasSwitch(switches::kEnableThreadedCompositing)) {
       command_line.AppendSwitch(switches::kDisableThreadedCompositing);
       command_line.AppendSwitch(cc::switches::kDisableThreadedAnimation);
     }
@@ skipping 174 matching lines @@
 
   return renderer_client_.get();
 }
 
 ContentUtilityClient* ShellMainDelegate::CreateContentUtilityClient() {
   utility_client_.reset(new ShellContentUtilityClient);
   return utility_client_.get();
 }
 
 }  // namespace content