New media playback UI.

Source/core/html/shadow/MediaControlElementTypes.h

Index: Source/core/html/shadow/MediaControlElementTypes.h
diff --git a/Source/core/html/shadow/MediaControlElementTypes.h b/Source/core/html/shadow/MediaControlElementTypes.h
index 09ad25fe82421f4fb91c91483cb4f623a241aef4..ab4c10ed937f8cbdbd8e46c6f8abbb0ff6baea26 100644
--- a/Source/core/html/shadow/MediaControlElementTypes.h
+++ b/Source/core/html/shadow/MediaControlElementTypes.h
@@ -76,8 +76,19 @@ CORE_EXPORT MediaControlElementType mediaControlElementType(Node*);
 
 class MediaControlElement : public WillBeGarbageCollectedMixin {
 public:
-    void hide();
-    void show();
+    // These hold the state about whether this control should be shown if
+    // space permits.  These will also show / hide as needed.
+    void setIsWanted(bool);
+    bool isWanted();
+
+    // Tell us whether we fit or not.  This will hide / show the control as
+    // needed, also.
+    void setDoesFit(bool);
+
+    // This returns the minimum width in pixels that we need to show
+    // this control.  Ideally, this would just be shorthand for the computed
+    // style, but this must also work when the control is hidden.
+    int minimumWidth();

[liberato (no reviews please), 2015/08/04 15:07:00]

in cases where the bar had between 48 and 54 pixel remaining, having the numeric
time display in place of the slider was just weird.  switched it so they stay
strictly in order.

 
     MediaControlElementType displayType() { return m_displayType; }
 
@@ -92,9 +103,15 @@ protected:
     void setDisplayType(MediaControlElementType);
 
 private:
+    // Hide or show based on our fits / wanted state.  We want to show
+    // if and only if we're wanted and we fit.
+    void updateShownState();
+
     MediaControls& m_mediaControls;
     MediaControlElementType m_displayType;
     RawPtrWillBeMember<HTMLElement> m_element;
+    bool m_isWanted : 1;
+    bool m_doesFit : 1;
 };
 
 // ----------------------------