Update use of SkCanvas and SkDevice to match change in Skia

skia/ext/vector_canvas.cc

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "skia/ext/vector_canvas.h"
 
 namespace skia {
 
-VectorCanvas::VectorCanvas() {
+VectorCanvas::VectorCanvas()
+    : PlatformCanvas(SkNEW(SkVectorPlatformDeviceFactory)) {
+}
+
+VectorCanvas::VectorCanvas(SkDeviceFactory* factory) : PlatformCanvas(factory) {
 }
 
 VectorCanvas::~VectorCanvas() {
 }
 
 SkBounder* VectorCanvas::setBounder(SkBounder* bounder) {
   if (!IsTopDeviceVectorial())
     return PlatformCanvas::setBounder(bounder);
 
   // This function isn't used in the code. Verify this assumption.
   SkASSERT(false);
   return NULL;
 }
 
 SkDrawFilter* VectorCanvas::setDrawFilter(SkDrawFilter* filter) {
   // This function isn't used in the code. Verify this assumption.
   SkASSERT(false);
   return NULL;
 }
 
 bool VectorCanvas::IsTopDeviceVectorial() const {
   return getTopPlatformDevice().IsVectorial();
 }
 
 }  // namespace skia