Make sure proper double tap scale gets recorded for next double tap.

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 1258 matching lines @@
 
     float scale;
     WebPoint scroll;
     bool doubleTapShouldZoomOut;
 
     computeScaleAndScrollForBlockRect(blockBounds, touchPointPadding, scale, scroll, doubleTapShouldZoomOut);
 
     bool isAnimating;
 
     if (doubleTapShouldZoomOut) {
-        isAnimating = startPageScaleAnimation(mainFrameImpl()->frameView()->windowToContents(point), true, minimumPageScaleFactor(), doubleTapZoomAnimationDurationInSeconds);
+        scale = minimumPageScaleFactor();
+        isAnimating = startPageScaleAnimation(mainFrameImpl()->frameView()->windowToContents(point), true, scale, doubleTapZoomAnimationDurationInSeconds);
     } else {
         isAnimating = startPageScaleAnimation(scroll, false, scale, doubleTapZoomAnimationDurationInSeconds);
     }
 
     if (isAnimating) {
         m_doubleTapZoomPageScaleFactor = scale;
         m_doubleTapZoomPending = true;
     }
 }
 
@@ skipping 2793 matching lines @@
 }
 
 bool WebViewImpl::shouldDisableDesktopWorkarounds()
 {
     ViewportArguments arguments = mainFrameImpl()->frame()->document()->viewportArguments();
     return arguments.width == ViewportArguments::ValueDeviceWidth || !arguments.userZoom
         || (arguments.minZoom == arguments.maxZoom && arguments.minZoom != ViewportArguments::ValueAuto);
 }
 
 } // namespace WebKit