Record whether and why the media default controls are being shown.

third_party/WebKit/Source/core/html/shadow/MediaControls.cpp

Index: third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
index e78e237e5fd378fe3dd1430bdd455906ad4f9cad..7692c8abc5647945621c9430119d242bc60ad355 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
@@ -282,6 +282,7 @@ void MediaControls::show()
 
 void MediaControls::mediaElementFocused()
 {
+    mediaElement().recordShowControls();

[philipj_slow, 2016/02/16 06:20:27]

This case is akin to the mouse moving over the video, which isn't counted
separately. While it is possible for ensureMediaControls() to create the
controls and start playing while the video is hidden such that the user never
sees the controls until moving the mouse or tabbing it into focus, these are odd
cases I don't think ought to be mixed in with the question "which condition
causes the media controls to be potentially visible?"

[mlamouri (slow - plz ping), 2016/02/18 15:49:31]

Removed.

     if (mediaElement().shouldShowControls()) {
         show();
         resetHideMediaControlsTimer();