Remove all the ephemeral apps code.

chrome/browser/apps/app_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "apps/launcher.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/prefs/pref_service.h"
@@ skipping 957 matching lines @@
   }
 
   bool seen() const {
     return seen_;
   }
 
   // ExtensionRegistryObserver:
   void OnExtensionWillBeInstalled(content::BrowserContext* browser_context,
                                   const extensions::Extension* extension,
                                   bool is_update,
-                                  bool from_ephemeral,
                                   const std::string& old_name) override {
     EXPECT_FALSE(seen_);
     seen_ = true;
   }
 
  private:
   bool seen_;
   extensions::ExtensionRegistry* registry_;
 };
 
@@ skipping 386 matching lines @@
   // Now check that the app window's default zoom, and actual zoom level,
   // have not been changed from the default.
   WebContents* web_contents = GetFirstAppWindowWebContents();
   content::HostZoomMap* app_host_zoom_map = content::HostZoomMap::Get(
       web_contents->GetSiteInstance());
   EXPECT_EQ(0, app_host_zoom_map->GetDefaultZoomLevel());
   EXPECT_EQ(0, app_host_zoom_map->GetZoomLevel(web_contents));
 }
 
 }  // namespace extensions