Bug 1349750 - Remove the no-longer-used WebRenderScrollData[Wrapper]::GetScrollThumbLength(). r=kats

Also remove a vestigial declaration of the previously removed method
HitTestingTreeNode::GetScrollThumbLength().

MozReview-Commit-ID: 3BvFNeGwPXd

--HG--
extra : rebase_source : 6cc6d2f2e3ecc4dedce2b83f6b0faf819f4be0f8

gfx/layers/apz/src/HitTestingTreeNode.h

@@ -95,7 +95,6 @@ public:
                         ScrollDirection aDir,
                         bool aIsScrollContainer);
   bool MatchesScrollDragMetrics(const AsyncDragMetrics& aDragMetrics) const;
-  LayerIntCoord GetScrollThumbLength() const;
   bool IsScrollbarNode() const;
   FrameMetrics::ViewID GetScrollTargetId() const;
 

gfx/layers/wr/WebRenderScrollData.cpp

@@ -45,9 +45,6 @@ WebRenderLayerScrollData::Initialize(WebRenderScrollData& aOwner,
       : EventRegionsOverride::NoOverride;
   mScrollbarDirection = aLayer->GetScrollThumbData().mDirection;
   mScrollbarTargetContainerId = aLayer->GetScrollbarTargetContainerId();
-  mScrollThumbLength = mScrollbarDirection == ScrollDirection::VERTICAL
-      ? aLayer->GetVisibleRegion().GetBounds().height
-      : aLayer->GetVisibleRegion().GetBounds().width;
   mIsScrollbarContainer = aLayer->IsScrollbarContainer();
   mFixedPosScrollContainerId = aLayer->GetFixedPositionScrollContainerId();
 }

gfx/layers/wr/WebRenderScrollData.h

@@ -55,7 +55,6 @@ public:
   EventRegionsOverride GetEventRegionsOverride() const { return mEventRegionsOverride; }
   ScrollDirection GetScrollbarDirection() const { return mScrollbarDirection; }
   FrameMetrics::ViewID GetScrollbarTargetContainerId() const { return mScrollbarTargetContainerId; }
-  int32_t GetScrollThumbLength() const { return mScrollThumbLength; }
   bool IsScrollbarContainer() const { return mIsScrollbarContainer; }
   FrameMetrics::ViewID GetFixedPositionScrollContainerId() const { return mFixedPosScrollContainerId; }
 
@@ -85,7 +84,6 @@ private:
   EventRegionsOverride mEventRegionsOverride;
   ScrollDirection mScrollbarDirection;
   FrameMetrics::ViewID mScrollbarTargetContainerId;
-  int32_t mScrollThumbLength;
   bool mIsScrollbarContainer;
   FrameMetrics::ViewID mFixedPosScrollContainerId;
 };
@@ -168,7 +166,6 @@ struct ParamTraits<mozilla::layers::WebRenderLayerScrollData>
     WriteParam(aMsg, aParam.mEventRegionsOverride);
     WriteParam(aMsg, aParam.mScrollbarDirection);
     WriteParam(aMsg, aParam.mScrollbarTargetContainerId);
-    WriteParam(aMsg, aParam.mScrollThumbLength);
     WriteParam(aMsg, aParam.mIsScrollbarContainer);
     WriteParam(aMsg, aParam.mFixedPosScrollContainerId);
   }
@@ -186,7 +183,6 @@ struct ParamTraits<mozilla::layers::WebRenderLayerScrollData>
         && ReadParam(aMsg, aIter, &aResult->mEventRegionsOverride)
         && ReadParam(aMsg, aIter, &aResult->mScrollbarDirection)
         && ReadParam(aMsg, aIter, &aResult->mScrollbarTargetContainerId)
-        && ReadParam(aMsg, aIter, &aResult->mScrollThumbLength)
         && ReadParam(aMsg, aIter, &aResult->mIsScrollbarContainer)
         && ReadParam(aMsg, aIter, &aResult->mFixedPosScrollContainerId);
   }

gfx/layers/wr/WebRenderScrollDataWrapper.h

@@ -291,12 +291,6 @@ public:
     return mLayer->GetScrollbarTargetContainerId();
   }
 
-  int32_t GetScrollThumbLength() const
-  {
-    MOZ_ASSERT(IsValid());
-    return mLayer->GetScrollThumbLength();
-  }
-
   bool IsScrollbarContainer() const
   {
     MOZ_ASSERT(IsValid());