Fix TextInputClientMac related crashes of Fullscreen RenderWidget

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 904 matching lines @@
 }
 
 RenderWidgetHostView* WebContentsImpl::GetTopLevelRenderWidgetHostView() {
   if (GetOuterWebContents())
     return GetOuterWebContents()->GetTopLevelRenderWidgetHostView();
   return GetRenderManager()->GetRenderWidgetHostView();
 }
 
 RenderWidgetHostView* WebContentsImpl::GetFullscreenRenderWidgetHostView()
     const {
-  RenderWidgetHost* const widget_host =
-      RenderWidgetHostImpl::FromID(fullscreen_widget_process_id_,
-                                   fullscreen_widget_routing_id_);
-  return widget_host ? widget_host->GetView() : NULL;
+  if (auto widget_host = GetFullscreenRenderWidgetHost())
+    return widget_host->GetView();
+  return nullptr;
 }
 
 WebContentsView* WebContentsImpl::GetView() const {
   return view_.get();
 }
 
 SkColor WebContentsImpl::GetThemeColor() const {
   return theme_color_;
 }
 
@@ skipping 4142 matching lines @@
   return capturer_count_ == 0 && !should_normally_be_visible_;
 }
 
 int WebContentsImpl::GetOuterDelegateFrameTreeNodeId() {
   if (node_ && node_->outer_web_contents())
     return node_->outer_contents_frame_tree_node_id();
 
   return FrameTreeNode::kFrameTreeNodeInvalidId;
 }
 
+RenderWidgetHostImpl* WebContentsImpl::GetFullscreenRenderWidgetHost() const {
+  return RenderWidgetHostImpl::FromID(fullscreen_widget_process_id_,
+                                      fullscreen_widget_routing_id_);
+}
+
 RenderFrameHostManager* WebContentsImpl::GetRenderManager() const {
   return frame_tree_.root()->render_manager();
 }
 
 BrowserPluginGuest* WebContentsImpl::GetBrowserPluginGuest() const {
   return browser_plugin_guest_.get();
 }
 
 void WebContentsImpl::SetBrowserPluginGuest(BrowserPluginGuest* guest) {
   CHECK(!browser_plugin_guest_);
@@ skipping 166 matching lines @@
   dialog_manager_ = dialog_manager;
 }
 
 void WebContentsImpl::RemoveBindingSet(const std::string& interface_name) {
   auto it = binding_sets_.find(interface_name);
   if (it != binding_sets_.end())
     binding_sets_.erase(it);
 }
 
 }  // namespace content