Files.app: random code clean up.

chrome/browser/chromeos/file_manager/app_installer.h

Index: chrome/browser/chromeos/file_manager/app_installer.h
diff --git a/chrome/browser/chromeos/file_manager/app_installer.h b/chrome/browser/chromeos/file_manager/app_installer.h
index e2e6b1899e38d136015c8e824e6a3def7c1b7890..bc16def2dd70030f2549e2b8276d73379415265b 100644
--- a/chrome/browser/chromeos/file_manager/app_installer.h
+++ b/chrome/browser/chromeos/file_manager/app_installer.h
@@ -9,7 +9,6 @@
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/webstore_standalone_installer.h"
-#include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 class WebContents;
@@ -19,13 +18,10 @@ namespace file_manager {
 
 // This class is used for installing apps and extensions suggested from the
 // Chrome Web Store for unsupported file types, inside Files.app.
-class AppInstaller
-    : public extensions::WebstoreStandaloneInstaller {
+class AppInstaller : public extensions::WebstoreStandaloneInstaller {
  public:
-  typedef extensions::WebstoreStandaloneInstaller::Callback Callback;
-
   AppInstaller(content::WebContents* web_contents,
-               const std::string& webstore_item_id,
+               const std::string& item_id,
                Profile* profile,
                const Callback& callback);