Remove old pinch-zoom paths from Blink

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index fee62f9a007786e2fe64a1ce1666036f7202555f..ac1153c3e08c317c8c8654f00e610dba7ad6b18b 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -120,12 +120,6 @@ public:
     virtual void setCursorVisibilityState(bool isVisible) override;
     virtual bool hasTouchEventHandlersAt(const WebPoint&) override;
 
-    // FIXME(bokan): Old pinch path only - This should be removed once old pinch
-    // is removed.
-    virtual void applyViewportDeltas(
-        const WebSize& scrollDelta,
-        float pageScaleDelta,
-        float topControlsShownRatioDelta) override;
     virtual void applyViewportDeltas(
         const WebFloatSize& pinchViewportDelta,
         const WebFloatSize& mainFrameDelta,
@@ -516,17 +510,11 @@ public:
     // Returns the bounding box of the block type node touched by the WebPoint.
     WebRect computeBlockBound(const WebPoint&, bool ignoreClipping);
 
-    // FIXME(bokan): Replace with PinchViewport::clampDocumentOffsetAtScale once
-    // old-path is gone.
-    IntPoint clampOffsetAtScale(const IntPoint& offset, float scale);
-
     // Exposed for tests.
     WebVector<WebCompositionUnderline> compositionUnderlines() const;
 
     WebLayerTreeView* layerTreeView() const { return m_layerTreeView; }
 
-    bool pinchVirtualViewportEnabled() const;
-
     bool matchesHeuristicsForGpuRasterizationForTesting() const { return m_matchesHeuristicsForGpuRasterization; }
 
     virtual void setTopControlsHeight(float height, bool topControlsShrinkLayoutSize) override;
@@ -544,15 +532,10 @@ public:
     PageScaleConstraintsSet& pageScaleConstraintsSet() { return m_pageScaleConstraintsSet; }
 
 private:
-    // TODO(bokan): Remains for legacy pinch. Remove once it's gone. Made private to
-    // prevent external usage
-    virtual void setPageScaleFactor(float scaleFactor, const WebPoint& origin) override;
     void setPageScaleFactorAndLocation(float, const FloatPoint&);
 
     void scrollAndRescaleViewports(float scaleFactor, const IntPoint& mainFrameOrigin, const FloatPoint& pinchViewportOrigin);
 
-    IntRect visibleRectInDocument() const;
-
     float maximumLegiblePageScale() const;
     void refreshPageScaleFactorAfterLayout();
     void resumeTreeViewCommits();