Add -ifsameorigin to autoplay experiment.

third_party/WebKit/Source/core/html/AutoplayExperimentHelper.cpp

 // Copyright 2016 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 "core/html/AutoplayExperimentHelper.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/layout/LayoutBox.h"
@@ skipping 309 matching lines @@
 
     if (!m_playPending && !client().shouldAutoplay())
         return false;
 
     // Note that the viewport test always returns false on desktop, which is
     // why video-autoplay-experiment.html doesn't check -ifmobile .
     if (enabled(IfMobile)
         && !client().isLegacyViewportType())
         return false;
 
+    // If we require same-origin, then check the origin.
+    if (enabled(IfSameOrigin) && client().isCrossOrigin())
+        return false;
+
     // If we require muted media and this is muted, then it is eligible.
     if (enabled(IfMuted))
         return client().muted();
 
     // Element is eligible for gesture override, maybe muted.
     return true;
 }
 
 void AutoplayExperimentHelper::muteIfNeeded()
 {
@@ skipping 47 matching lines @@
     if (mode.contains("-ifpagevisible"))
         value |= IfPageVisible;
     if (mode.contains("-ifviewport"))
         value |= IfViewport;
     if (mode.contains("-ifpartialviewport"))
         value |= IfPartialViewport;
     if (mode.contains("-ifmuted"))
         value |= IfMuted;
     if (mode.contains("-ifmobile"))
         value |= IfMobile;
+    if (mode.contains("-ifsameorigin"))
+        value |= IfSameOrigin;
     if (mode.contains("-playmuted"))
         value |= PlayMuted;
 
     return value;
 }
 
 void AutoplayExperimentHelper::autoplayMediaEncountered()
 {
     if (!m_autoplayMediaEncountered) {
         m_autoplayMediaEncountered = true;
@@ skipping 77 matching lines @@
         ? AnyVideoElement
         : AnyAudioElement);
 }
 
 bool AutoplayExperimentHelper::requiresViewportVisibility() const
 {
     return enabled(IfViewport) || enabled(IfPartialViewport);
 }
 
 } // namespace blink