Add profile selector menu to app list.

chrome/browser/ui/app_list/apps_model_builder.cc

Index: chrome/browser/ui/app_list/apps_model_builder.cc
diff --git a/chrome/browser/ui/app_list/apps_model_builder.cc b/chrome/browser/ui/app_list/apps_model_builder.cc
index b662b4537f18f1e81c044f4cd06ae4d4126915d1..5afbfb818d9445f995feae5f6064d97afbeee820 100644
--- a/chrome/browser/ui/app_list/apps_model_builder.cc
+++ b/chrome/browser/ui/app_list/apps_model_builder.cc
@@ -172,6 +172,16 @@ void AppsModelBuilder::AddApps(const ExtensionSet* extensions, Apps* apps) {
   }
 }
 
+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();