Fix classes that have too many virtuals for inline constructors.

content/public/renderer/content_renderer_client.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/public/renderer/content_renderer_client.h"
 
 #include "content/public/renderer/media_stream_renderer_factory.h"
 #include "media/base/renderer_factory.h"
 #include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerClient.h"
 
 namespace content {
 
+ContentRendererClient::ContentRendererClient() = default;
+
 SkBitmap* ContentRendererClient::GetSadPluginBitmap() {
   return nullptr;
 }
 
 SkBitmap* ContentRendererClient::GetSadWebViewBitmap() {
   return nullptr;
 }
 
 bool ContentRendererClient::OverrideCreatePlugin(
     RenderFrame* render_frame,
@@ skipping 182 matching lines @@
 scoped_ptr<blink::WebAppBannerClient>
 ContentRendererClient::CreateAppBannerClient(RenderFrame* render_frame) {
   return nullptr;
 }
 
 bool ContentRendererClient::ShouldEnforceWebRTCRoutingPreferences() {
   return true;
 }
 
 }  // namespace content