Bug 1347411 part 2. Fix stylo to properly update styles for the various frames that use FCDATA_WITH_WRAPPING_BLOCK to wrap an anonymous block around their kids. r=heycam

This handles ::-moz-button-content, ::-moz-html-canvas-content, ::-moz-svg-text,
::-moz-svg-foreign-content.

MozReview-Commit-ID: 3xk7214X2uR

layout/forms/nsHTMLButtonControlFrame.h

@@ -97,6 +97,12 @@ public:
       ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
   }
 
+  /**
+   * Update the style of our ::-moz-button-content anonymous box.
+   */
+  void DoUpdateStyleOfOwnedAnonBoxes(mozilla::ServoStyleSet& aStyleSet,
+                                     nsStyleChangeList& aChangeList,
+                                     nsChangeHint aHintForThisFrame) override;
 protected:
   virtual bool IsInput() { return false; }