Canvas2d: Fix a bug to update incorrect rect bounds for accessibility.

Source/modules/canvas2d/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 2150 matching lines @@
 
     SkIRect dirtyRect;
     if (!computeDirtyRect(path.strokeBoundingRect(strokeData), &dirtyRect))
         return;
 
     didDraw(dirtyRect);
 }
 
 void CanvasRenderingContext2D::updateElementAccessibility(const Path& path, Element* element)
 {
+    element->document().updateLayoutIgnorePendingStylesheets();
     AXObjectCache* axObjectCache = element->document().existingAXObjectCache();
     LayoutBoxModelObject* lbmo = canvas()->layoutBoxModelObject();
     LayoutObject* renderer = canvas()->layoutObject();
     if (!axObjectCache || !lbmo || !renderer)
         return;
 
     // Get the transformed path.
     Path transformedPath = path;
     transformedPath.transform(state().transform());
 
@@ skipping 135 matching lines @@
         if (imageType == CanvasRenderingContext2DState::NonOpaqueImage)
             return;
         if (alpha < 0xFF)
             return;
     }
 
     canvas()->buffer()->willOverwriteCanvas();
 }
 
 } // namespace blink