Extract shell methods from ApplicationImpl into a base class, and pass this to Initialize() instead.

components/web_view/test_frame_tree_delegate.cc

 // Copyright 2015 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 "components/web_view/test_frame_tree_delegate.h"
 
 #include <utility>
 
 #include "base/run_loop.h"
 #include "components/web_view/client_initiated_frame_connection.h"
 #include "components/web_view/frame_connection.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace web_view {
 
-TestFrameTreeDelegate::TestFrameTreeDelegate(mojo::ApplicationImpl* app)
-    : app_(app),
+TestFrameTreeDelegate::TestFrameTreeDelegate(mojo::Shell* shell)
+    : shell_(shell),
       waiting_for_create_frame_(false),
       waiting_for_destroy_frame_(nullptr),
       most_recent_frame_(nullptr),
       waiting_for_frame_disconnected_(nullptr) {}
 
 TestFrameTreeDelegate::~TestFrameTreeDelegate() {}
 
 Frame* TestFrameTreeDelegate::WaitForCreateFrame() {
   if (is_waiting()) {
     ADD_FAILURE() << "already waiting";
@@ skipping 41 matching lines @@
 void TestFrameTreeDelegate::TitleChanged(const mojo::String& title) {}
 
 void TestFrameTreeDelegate::NavigateTopLevel(Frame* source,
                                              mojo::URLRequestPtr request) {}
 
 void TestFrameTreeDelegate::CanNavigateFrame(
     Frame* target,
     mojo::URLRequestPtr request,
     const CanNavigateFrameCallback& callback) {
   FrameConnection::CreateConnectionForCanNavigateFrame(
-      app_, target, std::move(request), callback);
+      shell_, target, std::move(request), callback);
 }
 
 void TestFrameTreeDelegate::DidStartNavigation(Frame* frame) {}
 
 void TestFrameTreeDelegate::DidCommitProvisionalLoad(Frame* frame) {}
 
 void TestFrameTreeDelegate::DidNavigateLocally(Frame* source,
                                                const GURL& url) {}
 
 void TestFrameTreeDelegate::DidCreateFrame(Frame* frame) {
@@ skipping 11 matching lines @@
 }
 
 void TestFrameTreeDelegate::OnWindowEmbeddedInFrameDisconnected(Frame* frame) {
   if (waiting_for_frame_disconnected_ == frame) {
     waiting_for_frame_disconnected_ = nullptr;
     run_loop_->Quit();
   }
 }
 
 }  // namespace web_view