Fix homepage migration for users who never changed their settings.

chrome/browser/prefs/pref_service.cc

Index: chrome/browser/prefs/pref_service.cc
diff --git a/chrome/browser/prefs/pref_service.cc b/chrome/browser/prefs/pref_service.cc
index de7f406748f82fbffd323af8b631ca6d1d6b8253..ea1d705eac19c365f2940c65f9b3eead5ea9b2f9 100644
--- a/chrome/browser/prefs/pref_service.cc
+++ b/chrome/browser/prefs/pref_service.cc
@@ -684,6 +684,31 @@ const DictionaryValue* PrefService::GetDictionary(const char* path) const {
   return static_cast<const DictionaryValue*>(value);
 }
 
+const base::Value* PrefService::GetUserPrefValue(const char* path) const {
+  DCHECK(CalledOnValidThread());
+
+  const Preference* pref = FindPreference(path);
+  if (!pref) {
+    NOTREACHED() << "Trying to get an unregistered pref: " << path;
+    return NULL;
+  }
+
+  // Look for an existing preference in the user store. If it doesn't
+  // exist, return NULL.
+  base::Value* value = NULL;
+  if (user_pref_store_->GetMutableValue(path, &value) !=
+          PersistentPrefStore::READ_OK) {
+    return NULL;
+  }
+
+  if (!value->IsType(pref->GetType())) {
+    NOTREACHED() << "Pref value type doesn't match registered type.";
+    return NULL;
+  }
+
+  return value;
+}
+
 const ListValue* PrefService::GetList(const char* path) const {
   DCHECK(CalledOnValidThread());