Rename ExtensionsService to ExtensionService.

tools/wine_valgrind/chromium-valgrind-suppressions

 # Chromium-specific suppressions
 {
    dont_valgrind_python_1
    Memcheck:Cond
    ...
    obj:*python*
 }
 {
    dont_valgrind_python_2
    Memcheck:Value4
@@ skipping 287 matching lines @@
    ...
    fun:operator new
    fun:browser_sync::UIModelWorker::DoWorkAndWaitUntilDone
    fun:Syncer::SyncShare
 }
 {
    bug_31644
    Memcheck:Leak
    ...
    fun:operator new
-   fun:NewRunnableMethod<ExtensionsServiceBackend,void (__thiscall ExtensionsServiceBackend::*)(void)>
-   fun:ExtensionsService::ClearProvidersForTesting
+   fun:NewRunnableMethod<ExtensionServiceBackend,void (__thiscall ExtensionServiceBackend::*)(void)>
+   fun:ExtensionService::ClearProvidersForTesting
 }
 {
    bug_33424
    Memcheck:Leak
    ...
    fun:net::TCPClientSocketWin::Read
    fun:net::*::DoReadHeaders
    ...
    fun:net::*::OnIOComplete
 }
@@ skipping 17 matching lines @@
    ...
    fun:std::basic_stringbuf<char,std::char_traits<char>,std::allocator<char> >::~basic_stringbuf<char,std::char_traits<char>,std::allocator<char> >
    fun:std::basic_stringstream<char,std::char_traits<char>,std::allocator<char> >::~basic_stringstream<char,std::char_traits<char>,std::allocator<char> >
    fun:std::basic_stringstream<char,std::char_traits<char>,std::allocator<char> >::`vbase destructor'
    fun:testing::internal::StrStreamToString
    fun:testing::Message::GetString
    fun:testing::AssertionResult::operator<<<enum net::LoadLog::EventPhase>
    ...
    fun:SSLClientSocketTest_ConnectMismatched_Test::TestBody
 }