Add profile selector menu to app list.

chrome/browser/ui/app_list/apps_model_builder.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/app_list/apps_model_builder.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/prefs/pref_service.h"
@@ skipping 154 matching lines @@
     if (ShouldDisplayInAppLauncher(profile_, *app))
       apps->push_back(new ExtensionAppItem(profile_,
                                            (*app)->id(),
                                            controller_,
                                            "",
                                            gfx::ImageSkia(),
                                            (*app)->is_platform_app()));
   }
 }
 
+void AppsModelBuilder::SetProfile(Profile* profile) {
+  profile_ = profile;
+  model_->DeleteAll();
+  if (tracker_) {
+    tracker_->RemoveObserver(this);
+    tracker_ = extensions::InstallTrackerFactory::GetForProfile(profile_);

[koz (OOO until 15th September), 2013/09/09 22:58:07]

It's a bit tricky that we have tracker_->RemoveObserver() here and
tracker_->AddObserver() in Build(). Perhaps they should be merged into a single
function BuildForProfile(Profile*) or StartTrackingProfile(Profile*).

[calamity, 2013/09/10 22:50:46]

Removed the Build() method and changed SetProfile() to SwitchProfile() which
will now set up the tracker as well as build the model. SwitchProfile() is
called on construction to build the model for the given profile. Tests and
callsites have been updated.

+  }
+  Build();
+}
+
 void AppsModelBuilder::PopulateApps() {
   ExtensionService* service =
       extensions::ExtensionSystem::Get(profile_)->extension_service();
   if (!service)
     return;
 
   Apps apps;
   AddApps(service->extensions(), &apps);
   AddApps(service->disabled_extensions(), &apps);
   AddApps(service->terminated_extensions(), &apps);
@@ skipping 130 matching lines @@
 
   ExtensionAppItem* prev = target_index > 0 ? GetAppAt(target_index - 1) : NULL;
   ExtensionAppItem* next = target_index + 1 < model_->item_count() ?
       GetAppAt(target_index + 1) : NULL;
   GetAppAt(target_index)->Move(prev, next);
 }
 
 void AppsModelBuilder::ListItemsChanged(size_t start, size_t count) {
   NOTREACHED();
 }