Monitor the intersection of video and viewport.

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 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/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 334 matching lines @@
     observer_->OnEnteredFullscreen();
 }
 
 void WebMediaPlayerImpl::exitedFullscreen() {
   if (!force_video_overlays_ && !disable_fullscreen_video_overlays_)
     DisableOverlay();
   if (observer_)
     observer_->OnExitedFullscreen();
 }
 
+void WebMediaPlayerImpl::videoViewportIntersectionChanged(
+    const blink::WebMediaPlayer::ViewportIntersectionInfo& info) {
+  MediaObserver::ViewportIntersectionInfo intersect_info;
+  intersect_info.ratio = info.ratio;
+  intersect_info.root_rect =

[miu, 2016/11/15 23:29:26]

I think the types have implicit conversion defined. Meaning, you can just:

  intersect_info.root_rect = info.rootRect;
  intersect_info.intersect_rect = info.intersectRect;

[xjz, 2016/11/16 01:06:45]

Done.

+      gfx::Rect(info.rootRect.x, info.rootRect.y, info.rootRect.width,
+                info.rootRect.height);
+  intersect_info.intersect_rect =
+      gfx::Rect(info.intersectRect.x, info.intersectRect.y,
+                info.intersectRect.width, info.intersectRect.height);
+  if (observer_)
+    observer_->OnVideoViewportIntersectionChanged(intersect_info);
+}
+
 void WebMediaPlayerImpl::DoLoad(LoadType load_type,
                                 const blink::WebURL& url,
                                 CORSMode cors_mode) {
   DVLOG(1) << __func__;
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   GURL gurl(url);
   ReportMetrics(load_type, gurl, frame_->getSecurityOrigin());
 
   // Set subresource URL for crash reporting.
@@ skipping 1528 matching lines @@
       pipeline_metadata_.natural_size,
       base::Bind(&GetCurrentTimeInternal, this)));
   watch_time_reporter_->OnVolumeChange(volume_);
   if (delegate_ && delegate_->IsHidden())
     watch_time_reporter_->OnHidden();
   else
     watch_time_reporter_->OnShown();
 }
 
 }  // namespace media