Fix media element time display for times over an hour.

Source/core/testing/Internals.h

Index: Source/core/testing/Internals.h
diff --git a/Source/core/testing/Internals.h b/Source/core/testing/Internals.h
index 9d809e68ea3f5f9ded9259d141f0bbd1da07c800..1ed08904ce16a3096c0eae196431e593008ec8a1 100644
--- a/Source/core/testing/Internals.h
+++ b/Source/core/testing/Internals.h
@@ -384,6 +384,8 @@ public:
     bool setScrollbarVisibilityInScrollableArea(Node*, bool visible);
 
     void forceRestrictIFramePermissions();
+
+    String formatChromiumMediaControlsTime(float time, float duration, bool includeSeparator);
 private:
     explicit Internals(ScriptState*);
     Document* contextDocument() const;