Convert app banners to use Mojo.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index be3f4d1a6beca8aef6a21329087b5fcd49cab5a2..ada214825e8b2885fc36d931fd9510088aee828d 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -48,7 +48,6 @@
 #include "third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h"
 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
-#include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerClient.h"
 #include "third_party/WebKit/public/web/WebAXObject.h"
 #include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebFrameClient.h"
@@ -632,7 +631,6 @@ class CONTENT_EXPORT RenderFrameImpl
   void didChangeManifest() override;
   void enterFullscreen() override;
   void exitFullscreen() override;
-  blink::WebAppBannerClient* appBannerClient() override;
   void registerProtocolHandler(const blink::WebString& scheme,
                                const blink::WebURL& url,
                                const blink::WebString& title) override;
@@ -1243,8 +1241,6 @@ class CONTENT_EXPORT RenderFrameImpl
   // AccessibilityModeOff.
   RenderAccessibilityImpl* render_accessibility_;
 
-  std::unique_ptr<blink::WebAppBannerClient> app_banner_client_;
-
   std::unique_ptr<blink::WebBluetooth> bluetooth_;
 
   // Manages play, pause notifications for WebMediaPlayer implementations; its