Create autoplay policy flag and merge cross-origin autoplay blocking into it.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1667 matching lines @@
     const base::CommandLine& browser_cmd,
     base::CommandLine* renderer_cmd) {
   // Propagate the following switches to the renderer command line (along
   // with any associated values) if present in the browser command line.
   static const char* const kSwitchNames[] = {
     switches::kAgcStartupMinVolume,
     switches::kAecRefinedAdaptiveFilter,
     switches::kAllowLoopbackInPeerConnection,
     switches::kAndroidFontsPath,
     switches::kAudioBufferSize,
+    switches::kAutoplayPolicy,
     switches::kBlinkSettings,
     switches::kDefaultTileWidth,
     switches::kDefaultTileHeight,
     switches::kDisable2dCanvasImageChromium,
     switches::kDisable3DAPIs,
     switches::kDisableAcceleratedJpegDecoding,
     switches::kDisableAcceleratedVideoDecode,
     switches::kDisableBackgroundTimerThrottling,
     switches::kDisableBlinkFeatures,
     switches::kDisableBreakpad,
@@ skipping 1378 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing.
   // Capture the error message in a crash key value.
   base::debug::ScopedCrashKey error_key_value("mojo-message-error", error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content