Chrome-side patch for IsAppInstalled.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 4aaa5921a54aa6fb38a1095cd27e1381b37af9d1..716a5ee0ea3182e54386545acdc098a3b87cdc8d 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -91,6 +91,7 @@
 #include "content/renderer/history_serialization.h"
 #include "content/renderer/image_downloader/image_downloader_impl.h"
 #include "content/renderer/ime_event_guard.h"
+#include "content/renderer/installedapp/installed_app_dispatcher.h"
 #include "content/renderer/internal_document_state_data.h"
 #include "content/renderer/manifest/manifest_manager.h"
 #include "content/renderer/media/audio_device_factory.h"
@@ -4104,6 +4105,15 @@ blink::WebPushClient* RenderFrameImpl::pushClient() {
   return push_messaging_dispatcher_;
 }
 
+blink::WebInstalledApp* RenderFrameImpl::installedAppClient() {
+  if (!installed_app_client_) {
+    installed_app_client_.reset(
+        new InstalledAppDispatcher(this, GetServiceRegistry()));
+  }
+
+  return installed_app_client_.get();
+}
+
 void RenderFrameImpl::willStartUsingPeerConnectionHandler(
     blink::WebRTCPeerConnectionHandler* handler) {
 #if defined(ENABLE_WEBRTC)