Pepper: Fix nullptr crash in PepperWebPluginImpl::updateGeometry.

content/renderer/pepper/pepper_webplugin_impl.cc

 // Copyright (c) 2012 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 "content/renderer/pepper/pepper_webplugin_impl.h"
 
 #include <cmath>
 
 #include "base/debug/crash_logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 156 matching lines @@
     instance_->Paint(canvas, plugin_rect_, rect);
 }
 
 void PepperWebPluginImpl::updateGeometry(
     const WebRect& window_rect,
     const WebRect& clip_rect,
     const WebRect& unobscured_rect,
     const WebVector<WebRect>& cut_outs_rects,
     bool is_visible) {
   plugin_rect_ = window_rect;
-  if (!instance_->FlashIsFullscreenOrPending()) {
+  if (instance_ && !instance_->FlashIsFullscreenOrPending()) {
     std::vector<gfx::Rect> cut_outs;
     for (size_t i = 0; i < cut_outs_rects.size(); ++i)
       cut_outs.push_back(cut_outs_rects[i]);
     instance_->ViewChanged(plugin_rect_, clip_rect, unobscured_rect, cut_outs);
   }
 }
 
 void PepperWebPluginImpl::updateFocus(bool focused,
                                       blink::WebFocusType focus_type) {
   instance_->SetWebKitFocus(focused);
@@ skipping 100 matching lines @@
 
 bool PepperWebPluginImpl::canRotateView() { return instance_->CanRotateView(); }
 
 void PepperWebPluginImpl::rotateView(RotationType type) {
   instance_->RotateView(type);
 }
 
 bool PepperWebPluginImpl::isPlaceholder() { return false; }
 
 }  // namespace content