Make autoplay policies no longer platform dependant.

media/base/media_switches.h

 // 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.
 
 // Defines all the "media" command-line switches.
 
 #ifndef MEDIA_BASE_MEDIA_SWITCHES_H_
 #define MEDIA_BASE_MEDIA_SWITCHES_H_
 
 #include "base/feature_list.h"
 #include "build/build_config.h"
 #include "media/base/media_export.h"
 #include "media/media_features.h"
 #include "ppapi/features/features.h"
 
+namespace base {
+class CommandLine;
+}
+
 namespace switches {
 
 MEDIA_EXPORT extern const char kAudioBufferSize[];
 
 MEDIA_EXPORT extern const char kAutoplayPolicy[];
 
 MEDIA_EXPORT extern const char kVideoThreads[];
 
 MEDIA_EXPORT extern const char kEnableMediaSuspend[];
 MEDIA_EXPORT extern const char kDisableMediaSuspend[];
@@ skipping 87 matching lines @@
 MEDIA_EXPORT extern const base::Feature kVideoFullscreenOrientationLock;
 MEDIA_EXPORT extern const base::Feature kVideoRotateToFullscreen;
 MEDIA_EXPORT extern const base::Feature kMediaDrmPersistentLicense;
 #endif  // defined(OS_ANDROID)
 
 #if defined(OS_WIN)
 MEDIA_EXPORT extern const base::Feature kD3D11VideoDecoding;
 MEDIA_EXPORT extern const base::Feature kMediaFoundationH264Encoding;
 #endif  // defined(OS_WIN)
 
+// Based on a |command_line| and the current platform, returns the effective
+// autoplay policy. In other words, it will take into account the default policy
+// if none is specified via the command line and options passed for testing.
+// Returns one of the possible autoplay policy switches from the
+// switches::autoplay namespace.
+MEDIA_EXPORT std::string GetEffectiveAutoplayPolicy(
+    const base::CommandLine& command_line);
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_SWITCHES_H_