Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/test/base/testing_browser_process.cc

Index: chrome/test/base/testing_browser_process.cc
diff --git a/chrome/test/base/testing_browser_process.cc b/chrome/test/base/testing_browser_process.cc
index 33483818d216138bb63e92e88735cce9ea4511bf..7283813497584541af0c117cbbc2834f0a97f642 100644
--- a/chrome/test/base/testing_browser_process.cc
+++ b/chrome/test/base/testing_browser_process.cc
@@ -82,7 +82,7 @@ void TestingBrowserProcess::SetProfileManager(ProfileManager* profile_manager) {
 #endif
 }
 
-PrefService* TestingBrowserProcess::local_state() {
+PrefServiceSimple* TestingBrowserProcess::local_state() {
   return local_state_;
 }
 
@@ -317,7 +317,7 @@ void TestingBrowserProcess::SetSystemRequestContext(
   system_request_context_ = context_getter;
 }
 
-void TestingBrowserProcess::SetLocalState(PrefService* local_state) {
+void TestingBrowserProcess::SetLocalState(PrefServiceSimple* local_state) {
   if (!local_state) {
     // The local_state_ PrefService is owned outside of TestingBrowserProcess,
     // but some of the members of TestingBrowserProcess hold references to it