New media playback UI.

Source/core/html/shadow/MediaControls.h

Index: Source/core/html/shadow/MediaControls.h
diff --git a/Source/core/html/shadow/MediaControls.h b/Source/core/html/shadow/MediaControls.h
index 0c8f7ad3b959a3755d7dca5e027373463508189b..066d0bcb21f4b4463aca60e027fa923cf1fac4ca 100644
--- a/Source/core/html/shadow/MediaControls.h
+++ b/Source/core/html/shadow/MediaControls.h
@@ -68,6 +68,11 @@ public:
     void refreshCastButtonVisibility();
     void showOverlayCastButton();
 
+    // Update cast button visibility, but don't trigger a relayout.  This
+    // can e called while stopping DOM objects, during which a layout

[philipj_slow, 2015/07/08 15:06:38]

s/e/be/ but also see the comment about this not seeming to actually be layout
free.

[liberato (no reviews please), 2015/07/09 12:10:56]

this method is now refreshCastButtonVisibilityWithoutUpdate().

+    // can crash.
+    void refreshCastButtonVisibilityWithoutLayout();
+
     void mediaElementFocused();
 
     // Returns the layout object for the part of the controls that should be
@@ -103,6 +108,11 @@ private:
     // element in the page, it will be hidden.
     void tryShowOverlayCastButton();
 
+    // For the new UI, hide elements that don't fit, and show those things
+    // that we want that do fit.
+    void scheduleUpdateControlsVisibilityForSpace();

[fs, 2015/07/08 09:31:00]

I don't know what the "ForSpace" suffix is supposed to mean, but I don't think
it adds much.

[liberato (no reviews please), 2015/07/09 12:10:56]

it was intended to mean "based on what fits".  i'll think of a new name.

+    void updateControlsVisibilityForSpace();
+
     // Node
     bool isMediaControls() const override { return true; }
     bool willRespondToMouseMoveEvents() override { return true; }