Fix a crash in PageActionImageView when extensions are reloaded due to incognito settings changing.

chrome/browser/extensions/extension_service_unittest.cc

Index: chrome/browser/extensions/extension_service_unittest.cc
===================================================================
--- chrome/browser/extensions/extension_service_unittest.cc	(revision 108847)
+++ chrome/browser/extensions/extension_service_unittest.cc	(working copy)
@@ -454,6 +454,10 @@
   InitializeExtensionServiceHelper(false);
 }
 
+void ExtensionServiceTestBase::InitializeExtensionProcessManager() {
+  profile_->CreateExtensionProcessManager();
+}
+
 void ExtensionServiceTestBase::InitializeExtensionServiceWithUpdater() {
   InitializeExtensionServiceHelper(true);
   service_->updater()->Start();
@@ -3971,6 +3975,7 @@
 
 TEST_F(ExtensionServiceTest, ProcessSyncDataSettings) {
   InitializeEmptyExtensionService();
+  InitializeExtensionProcessManager();
   TestSyncProcessorStub processor;
   service_->MergeDataAndStartSyncing(syncable::EXTENSIONS, SyncDataList(),
       &processor);