Make autoplay policies no longer platform dependant.

media/base/media_util.cc

 // Copyright 2015 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_util.h"
 
+#include "base/command_line.h"
+#include "media/base/media_switches.h"
+
 namespace media {
 
 std::vector<uint8_t> EmptyExtraData() {
   return std::vector<uint8_t>();
 }
 
 EncryptionScheme Unencrypted() {
   return EncryptionScheme();
 }
 
 EncryptionScheme AesCtrEncryptionScheme() {
   return EncryptionScheme(EncryptionScheme::CIPHER_MODE_AES_CTR,
                           EncryptionScheme::Pattern());
 }
 
+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)) {
+#if defined(OS_ANDROID)
+    return switches::autoplay::kUserGestureRequiredPolicy;
+#else
+    return switches::autoplay::kNoUserGestureRequiredPolicy;
+#endif
+  }
+
+  return command_line.GetSwitchValueASCII(switches::kAutoplayPolicy);
+}
+
 }  // namespace media