Implement <video controls> dodging for text track layout

Source/core/html/shadow/MediaControls.cpp

Index: Source/core/html/shadow/MediaControls.cpp
diff --git a/Source/core/html/shadow/MediaControls.cpp b/Source/core/html/shadow/MediaControls.cpp
index b411b80e28e62a5f41c61e35d84c76dae5cec4eb..b0560f11dddbc156a7e77c71ccca1c75b39140a6 100644
--- a/Source/core/html/shadow/MediaControls.cpp
+++ b/Source/core/html/shadow/MediaControls.cpp
@@ -193,11 +193,16 @@ void MediaControls::reset()
     makeOpaque();
 }
 
+LayoutObject* MediaControls::layoutObjectForTextTrackLayout()
+{
+    return m_panel->layoutObject();
+}
+
 void MediaControls::show()
 {
     makeOpaque();
-    m_panel->setIsDisplayed(true);
     m_panel->show();

[philipj_slow, 2015/03/20 05:58:19]

This change of order isn't really needed, I just thought it cleaner if the
callback would always happen after the inline style change.

+    m_panel->setIsDisplayed(true);
     if (m_overlayPlayButton)
         m_overlayPlayButton->updateDisplayType();
 }
@@ -212,8 +217,8 @@ void MediaControls::mediaElementFocused()
 
 void MediaControls::hide()
 {
-    m_panel->setIsDisplayed(false);
     m_panel->hide();
+    m_panel->setIsDisplayed(false);
     if (m_overlayPlayButton)
         m_overlayPlayButton->hide();
 }