Fix for bug with pages loading in a background tab.

Occasionally, chrome would segfault when a background tab was loading.  I was running into this issue quite often when testing opening many tabs.


BUG=None
TEST=None


Review URL: http://codereview.chromium.org/7978011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102123 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/renderer_host/render_widget_host_view_views.cc

@@ -985,9 +985,13 @@ void RenderWidgetHostViewViews::GetDefaultScreenInfo(
 void RenderWidgetHostViewViews::GetScreenInfo(WebKit::WebScreenInfo* results) {
 #if !defined(USE_AURA)
   views::Widget* widget = GetWidget() ? GetWidget()->GetTopLevelWidget() : NULL;
-  if (widget)
+  if (widget && widget->GetNativeView())
     content::GetScreenInfoFromNativeWindow(widget->GetNativeView()->window,
                                            results);
+  else
+    RenderWidgetHostView::GetDefaultScreenInfo(results);
+#else
+  RenderWidgetHostView::GetDefaultScreenInfo(results);
 #endif
 }
 

views/widget/native_widget_views.cc

@@ -171,11 +171,13 @@ const Widget* NativeWidgetViews::GetWidget() const {
 }
 
 gfx::NativeView NativeWidgetViews::GetNativeView() const {
-  return GetParentNativeWidget()->GetNativeView();
+  return GetParentNativeWidget() ?
+      GetParentNativeWidget()->GetNativeView() : NULL;
 }
 
 gfx::NativeWindow NativeWidgetViews::GetNativeWindow() const {
-  return GetParentNativeWidget()->GetNativeWindow();
+  return GetParentNativeWidget() ?
+      GetParentNativeWidget()->GetNativeWindow() : NULL;
 }
 
 Widget* NativeWidgetViews::GetTopLevelWidget() {