Convert app banners to use Mojo.

chrome/renderer/chrome_render_frame_observer.cc

Index: chrome/renderer/chrome_render_frame_observer.cc
diff --git a/chrome/renderer/chrome_render_frame_observer.cc b/chrome/renderer/chrome_render_frame_observer.cc
index 977faf83e927caa2d683a55984e439d3115329fa..6ae8c9e8b020ccbddd4524469bb74a2de517905a 100644
--- a/chrome/renderer/chrome_render_frame_observer.cc
+++ b/chrome/renderer/chrome_render_frame_observer.cc
@@ -9,6 +9,7 @@
 
 #include <limits>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/command_line.h"
@@ -30,7 +31,6 @@
 #include "skia/ext/image_operations.h"
 #include "third_party/WebKit/public/platform/WebImage.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
-#include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerPromptReply.h"
 #include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
@@ -107,6 +107,15 @@ SkBitmap Downscale(const blink::WebImage& image,
 
 }  // namespace
 
+// static
+void ChromeRenderFrameObserver::BindBannerClient(
+      ChromeRenderFrameObserver* observer,
+      mojo::InterfaceRequest<blink::mojom::AppBannerClient> request) {
+  observer->banner_binding_.reset(
+      new mojo::Binding<blink::mojom::AppBannerClient>(observer,
+                                                       std::move(request)));
+}
+
 ChromeRenderFrameObserver::ChromeRenderFrameObserver(
     content::RenderFrame* render_frame)
     : content::RenderFrameObserver(render_frame),
@@ -149,8 +158,6 @@ bool ChromeRenderFrameObserver::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(PrintMsg_PrintNodeUnderContextMenu,
                         OnPrintNodeUnderContextMenu)
 #endif
-    IPC_MESSAGE_HANDLER(ChromeViewMsg_AppBannerPromptRequest,
-                        OnAppBannerPromptRequest)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -240,18 +247,27 @@ void ChromeRenderFrameObserver::OnSetClientSidePhishingDetection(
 #endif
 }
 
-void ChromeRenderFrameObserver::OnAppBannerPromptRequest(
-    int request_id,
-    const std::string& platform) {
-  // App banner prompt requests are handled in the general chrome render frame
-  // observer, not the AppBannerClient, as the AppBannerClient is created lazily
-  // by blink and may not exist when the request is sent.
-  blink::WebAppBannerPromptReply reply = blink::WebAppBannerPromptReply::None;
+void ChromeRenderFrameObserver::BannerPromptRequest(
+    blink::mojom::AppBannerServicePtr banner_service,
+    blink::mojom::AppBannerEventRequest event_request,
+    const std::string& platform,
+    const BannerPromptRequestCallback& callback) {
+  // Break up the InterfacePtr and InterfaceRequest so they can be passed
+  // through to Blink as ScopedMessagePipeHandle. They will be reconstituted on
+  // the other side.
+  mojo::ScopedMessagePipeHandle service_handle =
+      banner_service.PassInterface().PassHandle();
+  mojo::ScopedMessagePipeHandle event_handle = event_request.PassMessagePipe();
+
+  blink::mojom::AppBannerPromptReply reply =
+      blink::mojom::AppBannerPromptReply::NONE;
   blink::WebString web_platform(base::UTF8ToUTF16(platform));
   blink::WebVector<blink::WebString> web_platforms(&web_platform, 1);
 
   blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
-  frame->willShowInstallBannerPrompt(request_id, web_platforms, &reply);
+  frame->willShowInstallBannerPrompt(std::move(service_handle),
+                                     std::move(event_handle), web_platforms,
+                                     &reply);
 
   // Extract the referrer header for this site according to its referrer policy.
   // Pass in an empty URL as the destination so that it is always treated
@@ -260,8 +276,7 @@ void ChromeRenderFrameObserver::OnAppBannerPromptRequest(
       frame->document().referrerPolicy(), GURL(),
       frame->document().outgoingReferrer()).utf8();
 
-  Send(new ChromeViewHostMsg_AppBannerPromptReply(
-      routing_id(), request_id, reply, referrer));
+  callback.Run(reply, referrer);
 }
 
 void ChromeRenderFrameObserver::DidFinishLoad() {