Make SDCH classes IO-thread-only. Remove TSan suppression.

net/base/sdch_manager.h

Index: net/base/sdch_manager.h
diff --git a/net/base/sdch_manager.h b/net/base/sdch_manager.h
index 4324f407c9549ffcb8bd62efa15fea382f7d3780..00e2a714275969c20a5860257fed659b6c640e5f 100644
--- a/net/base/sdch_manager.h
+++ b/net/base/sdch_manager.h
@@ -29,6 +29,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
+#include "base/threading/non_thread_safe.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_export.h"
 
@@ -55,7 +56,7 @@ class SdchFetcher {
 
 //------------------------------------------------------------------------------
 
-class NET_EXPORT SdchManager {
+class NET_EXPORT SdchManager : public NON_EXPORTED_BASE(base::NonThreadSafe) {
  public:
   // A list of errors that appeared and were either resolved, or used to turn
   // off sdch encoding.
@@ -244,7 +245,7 @@ class NET_EXPORT SdchManager {
   static void SdchErrorRecovery(ProblemCodes problem);
 
   // Register a fetcher that this class can use to obtain dictionaries.
-  void set_sdch_fetcher(SdchFetcher* fetcher) { fetcher_.reset(fetcher); }
+  void set_sdch_fetcher(SdchFetcher* fetcher);
 
   // Enables or disables SDCH compression.
   static void EnableSdchSupport(bool enabled);