Bug 1518965: Remove nsPresContext::mLastResizeEventVisibleArea and accessor functions that are never used. r=botond

Differential Revision: https://phabricator.services.mozilla.com/D16126

--HG--
extra : moz-landing-system : lando

layout/base/nsPresContext.cpp

@@ -176,11 +176,6 @@ nsPresContext::nsPresContext(dom::Document* aDocument, nsPresContextType aType)
       mCurAppUnitsPerDevPixel(0),
       mAutoQualityMinFontSizePixelsPref(0),
       mLangService(nsLanguageAtomService::GetService()),
-      // origin nscoord_MIN is impossible, so the first ResizeReflow always
-      // fires
-      mLastResizeEventVisibleArea(nsRect(nscoord_MIN, nscoord_MIN,
-                                         NS_UNCONSTRAINEDSIZE,
-                                         NS_UNCONSTRAINEDSIZE)),
       mPageSize(-1, -1),
       mPageScale(0.0),
       mPPScale(1.0f),

layout/base/nsPresContext.h

@@ -476,12 +476,6 @@ class nsPresContext : public nsISupports,
     }
   }
 
-  bool ShouldFireResizeEvent() const {
-    return !mLastResizeEventVisibleArea.IsEqualEdges(mVisibleArea);
-  }
-
-  void WillFireResizeEvent() { mLastResizeEventVisibleArea = mVisibleArea; }
-
   /**
    * Return true if this presentation context is a paginated
    * context.
@@ -1312,7 +1306,6 @@ class nsPresContext : public nsISupports,
   mozilla::UniquePtr<gfxMissingFontRecorder> mMissingFonts;
 
   nsRect mVisibleArea;
-  nsRect mLastResizeEventVisibleArea;
   nsSize mPageSize;
   float mPageScale;
   float mPPScale;