Implement "appinstalled" event on Android.

chrome/browser/banners/app_banner_manager.h

Index: chrome/browser/banners/app_banner_manager.h
diff --git a/chrome/browser/banners/app_banner_manager.h b/chrome/browser/banners/app_banner_manager.h
index 19fd112a6306fe571c3f4ae740a979694dbdb5bc..706fd998d5036c04e6760608794cb4ec1987986e 100644
--- a/chrome/browser/banners/app_banner_manager.h
+++ b/chrome/browser/banners/app_banner_manager.h
@@ -16,6 +16,7 @@
 #include "chrome/browser/installable/installable_manager.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerPromptReply.h"
+#include "third_party/WebKit/public/platform/modules/installation/installation.mojom.h"
 
 class SkBitmap;
 struct WebApplicationInfo;
@@ -71,6 +72,11 @@ class AppBannerManager : public content::WebContentsObserver,
   // pipeline will be reported to the devtools console.
   virtual void RequestAppBanner(const GURL& validated_url, bool is_debug_mode);
 
+  // Informs the page that it has been installed via an app banner.
+  // This is redundant for the beforeinstallprompt event's promise being
+  // resolved, but is required by the install event spec.
+  void OnInstall();
+
   // Overridden and passed through base::Bind on desktop platforms. Called when
   // the bookmark app install initiated by a banner has completed. Not used on
   // Android.
@@ -262,6 +268,9 @@ class AppBannerManager : public content::WebContentsObserver,
   // Whether the installable status has been logged for this run.
   bool need_to_log_status_;
 
+  // Service to send events to the renderer.
+  blink::mojom::InstallationServicePtr installation_service_;
+
   // The concrete subclasses of this class are expected to have their lifetimes
   // scoped to the WebContents which they are observing. This allows us to use
   // weak pointers for callbacks.