Prevent duplicate concurrent installs of the same extension

chrome/browser/apps/ephemeral_app_launcher.h

Index: chrome/browser/apps/ephemeral_app_launcher.h
diff --git a/chrome/browser/apps/ephemeral_app_launcher.h b/chrome/browser/apps/ephemeral_app_launcher.h
index 8462f5da778ef0ddcc58fa0e90149d18f5e23a48..2d815161ecb2c2ebf9ed01bf5455f7f040c78e42 100644
--- a/chrome/browser/apps/ephemeral_app_launcher.h
+++ b/chrome/browser/apps/ephemeral_app_launcher.h
@@ -116,6 +116,8 @@ class EphemeralAppLauncher : public extensions::WebstoreStandaloneInstaller,
   void OnInstallChecked(int check_failures);
 
   // WebstoreStandaloneInstaller implementation.
+  virtual void InitInstallData(extensions::InstallTracker::InstallProgressData*
+                                   install_data) const OVERRIDE;

[asargent_no_longer_on_chrome, 2014/07/16 18:49:07]

nit: formatting looks weird, maybe > 80 chars? Pls ignore if you're already run
'git cl format' and this is what it came up with

[tmdiep, 2014/07/17 01:01:51]

Yes, this was the work of `git cl format`, but has been avoided now.

   virtual bool CheckRequestorAlive() const OVERRIDE;
   virtual const GURL& GetRequestorURL() const OVERRIDE;
   virtual bool ShouldShowPostInstallUI() const OVERRIDE;