Bug 451791 patch 1 - Remove write-only nsHTMLReflowState::mFlags::mHasClearance. r=roc

This was introduced in bug 209694 (gecko-dev 13a65028) but became unused
through bug 292295 (gecko-dev 4593df2a57) and bug 300030 (gecko-dev
31f18988).

--HG--
extra : commitid : 1YUuWOKeInm

layout/generic/nsBlockFrame.cpp

@@ -3313,7 +3313,6 @@ nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
     nsHTMLReflowState
       blockHtmlRS(aState.mPresContext, aState.mReflowState, frame,
                   availSpace.Size(wm).ConvertTo(frame->GetWritingMode(), wm));
-    blockHtmlRS.mFlags.mHasClearance = aLine->HasClearance();
 
     nsFloatManager::SavedState floatManagerState;
     nsReflowStatus frameReflowStatus;

layout/generic/nsHTMLReflowState.cpp

@@ -217,7 +217,6 @@ nsHTMLReflowState::nsHTMLReflowState(
   mFlags.mNextInFlowUntouched = aParentReflowState.mFlags.mNextInFlowUntouched &&
     CheckNextInFlowParenthood(aFrame, aParentReflowState.frame);
   mFlags.mAssumingHScrollbar = mFlags.mAssumingVScrollbar = false;
-  mFlags.mHasClearance = false;
   mFlags.mIsColumnBalancing = false;
   mFlags.mIsFlexContainerMeasuringHeight = false;
   mFlags.mDummyParentReflowState = false;

layout/generic/nsHTMLReflowState.h

@@ -553,7 +553,6 @@ public:
                                      // page?  When true, we force something
                                      // that's too tall for a page/column to
                                      // fit anyway to avoid infinite loops.
-    uint16_t mHasClearance:1;        // Block has clearance
     uint16_t mAssumingHScrollbar:1;  // parent frame is an nsIScrollableFrame and it
                                      // is assuming a horizontal scrollbar
     uint16_t mAssumingVScrollbar:1;  // parent frame is an nsIScrollableFrame and it