Media Controls: don't activate buttons when tapping on hidden controls.

third_party/WebKit/LayoutTests/media/media-controls.js

Index: third_party/WebKit/LayoutTests/media/media-controls.js
diff --git a/third_party/WebKit/LayoutTests/media/media-controls.js b/third_party/WebKit/LayoutTests/media/media-controls.js
index 673e92aac340729f0748358ae9e20de04396ab20..98a68f8a6602d2e5ea4d4e12a8bd2880a34e4464 100644
--- a/third_party/WebKit/LayoutTests/media/media-controls.js
+++ b/third_party/WebKit/LayoutTests/media/media-controls.js
@@ -180,3 +180,8 @@ function hasFullscreenButton(element)
     var size = mediaControlsButtonDimensions(element, "fullscreen-button");
     return size[0] > 0 && size[1] > 0;
 }
+
+function isControlsPanelVisible(element)
+{
+    return getComputedStyle(mediaControlsButton(element, "panel")).opacity == "1";
+}