Implement "appinstalled" event on Android.

chrome/browser/android/webapps/add_to_homescreen_manager.cc

Index: chrome/browser/android/webapps/add_to_homescreen_manager.cc
diff --git a/chrome/browser/android/webapps/add_to_homescreen_manager.cc b/chrome/browser/android/webapps/add_to_homescreen_manager.cc
index 2b972540eb30ee6467c29f8dd6860bf58553c9e7..b74906205386ccadc786095ea20fcd3c3b89def0 100644
--- a/chrome/browser/android/webapps/add_to_homescreen_manager.cc
+++ b/chrome/browser/android/webapps/add_to_homescreen_manager.cc
@@ -17,9 +17,12 @@
 #include "chrome/browser/android/webapk/webapk_metrics.h"
 #include "chrome/browser/banners/app_banner_settings_helper.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/origin_util.h"
 #include "jni/AddToHomescreenManager_jni.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "services/shell/public/cpp/interface_provider.h"
 #include "ui/gfx/android/java_bitmap.h"
 
 using base::android::JavaParamRef;
@@ -115,6 +118,14 @@ void AddToHomescreenManager::AddShortcut(const ShortcutInfo& info,
   ShortcutHelper::AddToLauncherWithSkBitmap(
       web_contents->GetBrowserContext(), info, uid, icon,
       data_fetcher_->FetchSplashScreenImageCallback(uid));
+

[dominickn, 2016/10/12 22:35:09]

This doesn't account for WebAPKs, which call ShortcutHelper::InstallWebApk
through AppBannerInfoBarDelegateAndroid. Of course, they also call
AppBannerManager::SendBannerAccepted if they're initiated from a banner, so you
have to be a bit careful about it.

[Matt Giuca, 2016/12/09 04:36:48]

As with Desktop, let's leave WebAPKs for another CL?

+  // Fire the appinstalled event.
+  if (!installation_service_) {
+    web_contents->GetMainFrame()->GetRemoteInterfaces()->GetInterface(
+        mojo::GetProxy(&installation_service_));
+    DCHECK(installation_service_);
+  }
+  installation_service_->OnInstall();
 }
 
 void AddToHomescreenManager::RecordAddToHomescreen() {