Remove unused CrxInstaller::create_app_shortcut_ field

Change-Id: Icfde8442ceca605f8fe055a407082bcd082257e6
Reviewed-on: https://chromium-review.googlesource.com/c/1335054Reviewed-by: Ben Wells <benwells@chromium.org>
Commit-Queue: Alan Cutter <alancutter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608247}

chrome/browser/extensions/crx_installer.cc

@@ -115,7 +115,6 @@ CrxInstaller::CrxInstaller(base::WeakPtr<ExtensionService> service_weak,
       fail_install_if_unexpected_version_(false),
       extensions_enabled_(service_weak->extensions_enabled()),
       delete_source_(false),
-      create_app_shortcut_(false),
       service_weak_(service_weak),
       // See header file comment on |client_| for why we use a raw pointer here.
       client_(client.release()),

chrome/browser/extensions/crx_installer.h

@@ -395,11 +395,6 @@ class CrxInstaller : public SandboxedUnpackerClient {
   // to false.
   bool delete_source_;
 
-  // Whether to create an app shortcut after successful installation. This is
-  // set based on the user's selection in the UI and can only ever be true for
-  // apps.
-  bool create_app_shortcut_;
-
   // The ordinal of the NTP apps page |extension_| will be shown on.
   syncer::StringOrdinal page_ordinal_;