Fix crash when destroying a RenderWidgetHost that holds the pointer

content/browser/renderer_host/render_widget_host_view_aura_unittest.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/renderer_host/render_widget_host_view_aura.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <tuple>
@@ skipping 162 matching lines @@
   // RenderWidgetHostDelegate:
   bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                               bool* is_keyboard_shortcut) override {
     last_event_.reset(new NativeWebKeyboardEvent(event));
     return true;
   }
   void Cut() override {}
   void Copy() override {}
   void Paste() override {}
   void SelectAll() override {}
+  bool HasMouseLock(RenderWidgetHostImpl*) override { return false; }
   void SendScreenRects() override {
     if (rwh_)
       rwh_->SendScreenRects();
   }
   bool IsFullscreenForCurrentTab() const override { return is_fullscreen_; }
 
  private:
   std::unique_ptr<NativeWebKeyboardEvent> last_event_;
   RenderWidgetHostImpl* rwh_;
   bool is_fullscreen_;
@@ skipping 4017 matching lines @@
       base::Bind(&ui::TextInputClient::InsertText,
                  base::Unretained(text_input_client()), base::string16());
   for (auto index : active_view_sequence_) {
     ActivateViewForTextInputManager(views_[index], ui::TEXT_INPUT_TYPE_TEXT);
     EXPECT_TRUE(!!RunAndReturnIPCSent(ime_call, processes_[index],
                                       InputMsg_ImeConfirmComposition::ID));
   }
 }
 
 }  // namespace content