Make canvas code a bit more resilient to crashes....

base/gfx/vector_canvas.cc

 // Copyright (c) 2006-2008 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 "base/gfx/vector_canvas.h"
 
 #include "base/gfx/vector_device.h"
 #include "base/logging.h"
 
 namespace gfx {
 
 VectorCanvas::VectorCanvas() {
 }
 
 VectorCanvas::VectorCanvas(HDC dc, int width, int height) {
-  initialize(dc, width, height);
+  bool initialized = initialize(dc, width, height);
+  CHECK(initialized);
 }
 
 VectorCanvas::~VectorCanvas() {
 }
 
-void VectorCanvas::initialize(HDC context, int width, int height) {
+bool VectorCanvas::initialize(HDC context, int width, int height) {
   SkDevice* device = createPlatformDevice(width, height, true, context);
+  if (!device)
+    return false;
+
   setDevice(device);
   device->unref();  // was created with refcount 1, and setDevice also refs
+  return true;
 }
 
 SkBounder* VectorCanvas::setBounder(SkBounder* bounder) {
   if (!IsTopDeviceVectorial())
     return PlatformCanvasWin::setBounder(bounder);
 
   // This function isn't used in the code. Verify this assumption.
   NOTREACHED();
   return NULL;
 }
@@ skipping 40 matching lines @@
       reinterpret_cast<HDC>(shared_section), width, height);
   return device;
 }
 
 bool VectorCanvas::IsTopDeviceVectorial() const {
   return getTopPlatformDevice().IsVectorial();
 }
 
 }  // namespace gfx