Make application shortcuts point to app_host.exe, install App Host during app installation.

chrome/browser/extensions/unpacked_installer.h

Index: chrome/browser/extensions/unpacked_installer.h
diff --git a/chrome/browser/extensions/unpacked_installer.h b/chrome/browser/extensions/unpacked_installer.h
index 6b48857aecdb039279a992d392c49f8c72063755..370fa6711f7b7c1c30e0b0e452e4cf5b0dc5679d 100644
--- a/chrome/browser/extensions/unpacked_installer.h
+++ b/chrome/browser/extensions/unpacked_installer.h
@@ -12,6 +12,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/extensions/app_host_installer.h"
 
 class ExtensionService;
 
@@ -87,6 +88,20 @@ class UnpackedInstaller
   // Called when an unpacked extension has been loaded and installed.
   void OnLoaded();
 
+  // Called when user commits to intalling an app.
+  void OnPromptAccepted();
+
+  // Runs on File thread. Ensures that App Host is installed, and then

[benwells, 2012/10/04 07:53:01]

Nit: File -> FILE

[huangs, 2012/10/04 22:56:42]

Done (for the file).

+  // proceeds to post CompleteExtensionInstall().
+  void BeginInstall();
+
+  // Callback function for AppHostInstaller.
+  void OnAppHostInstallation(bool success);
+
+  // Runs on File thread. Installs the unpacked extension into the profile and

[benwells, 2012/10/04 07:53:01]

Nit: File -> FILE

[huangs, 2012/10/04 22:56:42]

Done.

+  // notifies the frontend.
+  void CompleteInstall();
+
   // Helper to get the Extension::CreateFlags for the installing extension.
   int GetFlags();
 
@@ -108,6 +123,9 @@ class UnpackedInstaller
   // version.
   bool require_modern_manifest_version_;
 
+  // Helper to install App Host.
+  AppHostInstaller app_host_installer_;
+
   DISALLOW_COPY_AND_ASSIGN(UnpackedInstaller);
 };