Null-check GetView before using it in GetFocusedRenderWidgetHost.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 18589f15e14ca89b2a2c84366110b23d7f66114f..5392cf82d6a4f7e7299a71cc22c04c929dd53fb8 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1647,8 +1647,15 @@ RenderWidgetHostImpl* WebContentsImpl::GetFocusedRenderWidgetHost(
   if (!focused_frame)
     return receiving_widget;
 
-  return RenderWidgetHostImpl::From(
-      focused_frame->current_frame_host()->GetView()->GetRenderWidgetHost());
+  // The view may be null if a subframe's renderer process has crashed while
+  // the subframe has focus.  Drop the event in that case.  Do not give
+  // it to the main frame, so that the user doesn't unexpectedly type into the
+  // wrong frame if a focused subframe renderer crashes while they type.
+  RenderWidgetHostView* view = focused_frame->current_frame_host()->GetView();
+  if (!view)
+    return nullptr;
+
+  return RenderWidgetHostImpl::From(view->GetRenderWidgetHost());
 }
 
 void WebContentsImpl::EnterFullscreenMode(const GURL& origin) {