Make SdchManager per-profile.

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 33969aaf631aae482474aa6f8ae5bfbc036b88c9..9c550863d04b4b457e91ebe360146b141d3b0b9f 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -201,13 +201,6 @@ BrowserProcessImpl::~BrowserProcessImpl() {
 
 void BrowserProcessImpl::StartTearDown() {
     TRACE_EVENT0("shutdown", "BrowserProcessImpl::StartTearDown");
-  // We need to shutdown the SdchDictionaryFetcher as it regularly holds
-  // a pointer to a URLFetcher, and that URLFetcher (upon destruction) will do
-  // a PostDelayedTask onto the IO thread.  This shutdown call will both discard
-  // any pending URLFetchers, and avoid creating any more.
-  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
-                          base::Bind(&SdchDictionaryFetcher::Shutdown));
-
   // We need to destroy the MetricsServicesManager, IntranetRedirectDetector,
   // PromoResourceService, and SafeBrowsing ClientSideDetectionService (owned by
   // the SafeBrowsingService) before the io_thread_ gets destroyed, since their