Add support for a "split" incognito behavior for extensions.

chrome/browser/browser.cc

Index: chrome/browser/browser.cc
diff --git a/chrome/browser/browser.cc b/chrome/browser/browser.cc
index c208fe4042333e666687053e297f47d2f470f9d1..bf31024a8b994bb727939f42e833305131d2a4e0 100644
--- a/chrome/browser/browser.cc
+++ b/chrome/browser/browser.cc
@@ -3052,13 +3052,14 @@ void Browser::Observe(NotificationType type,
     case NotificationType::EXTENSION_UPDATE_DISABLED: {
       // Show the UI if the extension was disabled for escalated permissions.
       Profile* profile = Source<Profile>(source).ptr();
-      DCHECK_EQ(profile_, profile);
-      ExtensionsService* service = profile->GetExtensionsService();
-      DCHECK(service);
-      Extension* extension = Details<Extension>(details).ptr();
-      if (service->extension_prefs()->DidExtensionEscalatePermissions(
-              extension->id()))
-        ShowExtensionDisabledUI(service, profile_, extension);
+      if (profile_->IsSameProfile(profile)) {
+        ExtensionsService* service = profile->GetExtensionsService();
+        DCHECK(service);
+        Extension* extension = Details<Extension>(details).ptr();
+        if (service->extension_prefs()->DidExtensionEscalatePermissions(
+                extension->id()))
+          ShowExtensionDisabledUI(service, profile_, extension);
+      }
       break;
     }