Remove obsolete pinch-zoom related code.

Source/core/frame/PinchViewport.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 180 matching lines @@
 void PinchViewport::setScaleAndLocation(float scale, const FloatPoint& location)
 {
     bool valuesChanged = false;
 
     if (scale != m_scale) {
         m_scale = scale;
         valuesChanged = true;
         frameHost().chrome().client().pageScaleFactorChanged();
     }
 
-    // Old-style pinch sets scale here but we shouldn't call into the
-    // location code below. Can be removed when there's no old-style pinch.
-    // FIXME(bokan): Remove when cleaning up old pinch code.
-    if (!m_innerViewportScrollLayer) {
-        if (valuesChanged)
-            mainFrame()->loader().saveScrollState();
-
-        return;
-    }
-
     FloatPoint clampedOffset(clampOffsetToBoundaries(location));
 
     if (clampedOffset != m_offset) {
         m_offset = clampedOffset;
         scrollAnimator()->setCurrentPosition(m_offset);
 
-        ScrollingCoordinator* coordinator = frameHost().page().scrollingCoordinator();
-        ASSERT(coordinator);
-        coordinator->scrollableAreaScrollLayerDidChange(this);
+        // SVG runs with accelerated compositing disabled so no ScrollingCoordinator.
+        if (ScrollingCoordinator* coordinator = frameHost().page().scrollingCoordinator())
+            coordinator->scrollableAreaScrollLayerDidChange(this);
 
         Document* document = mainFrame()->document();
         document->enqueueScrollEventForNode(document);
 
         mainFrame()->loader().client()->didChangeScrollOffset();
         InspectorInstrumentation::didScroll(mainFrame());
         valuesChanged = true;
     }
 
     if (!valuesChanged)
@@ skipping 434 matching lines @@
     } else if (graphicsLayer == m_rootTransformLayer) {
         name =  "Root Transform Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink