Make autoplay policies no longer platform dependant.

media/base/media_switches.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 "media/base/media_switches.h"
+#include "base/command_line.h"
 #include "build/build_config.h"
-#include "media/base/media_switches.h"
 #include "ppapi/features/features.h"
 
 namespace switches {
 
 // Allow users to specify a custom buffer size for debugging purpose.
 const char kAudioBufferSize[] = "audio-buffer-size";
 
 // Command line flag name to set the autoplay policy.
 const char kAutoplayPolicy[] = "autoplay-policy";
 
@@ skipping 226 matching lines @@
 // Enables video decode acceleration using the D3D11 video decoder api.
 // This is completely insecure - DO NOT USE except for testing.
 const base::Feature kD3D11VideoDecoding{"D3D11VideoDecoding",
                                         base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables H264 HW encode acceleration using Media Foundation for Windows.
 const base::Feature kMediaFoundationH264Encoding{
     "MediaFoundationH264Encoding", base::FEATURE_ENABLED_BY_DEFAULT};
 #endif  // defined(OS_WIN)
 
+std::string GetEffectiveAutoplayPolicy(const base::CommandLine& command_line) {
+  if (command_line.HasSwitch(switches::kIgnoreAutoplayRestrictionsForTests))
+    return switches::autoplay::kNoUserGestureRequiredPolicy;
+
+  // Return the default policy if none is specified in the command line.
+  if (!command_line.HasSwitch(switches::kAutoplayPolicy)) {

[Bernhard Bauer, 2017/05/09 12:47:17]

Nit: I would probably flip this condition around, to keep the references to
kAutoplayPolicy closer together.

[mlamouri (slow - plz ping), 2017/05/09 17:24:35]

Done.

+#if defined(OS_ANDROID)
+    return switches::autoplay::kUserGestureRequiredPolicy;
+#else
+    return switches::autoplay::kNoUserGestureRequiredPolicy;
+#endif
+  }
+
+  return command_line.GetSwitchValueASCII(switches::kAutoplayPolicy);
+}
+
 }  // namespace media