Make SdchManager per-profile.

net/filter/filter.cc

Index: net/filter/filter.cc
diff --git a/net/filter/filter.cc b/net/filter/filter.cc
index ca6e51e6cdf8366b9559a11dcf7ae4c7b7732ac8..d77272a809d99412ad471cc97095adf4abb43f23 100644
--- a/net/filter/filter.cc
+++ b/net/filter/filter.cc
@@ -11,6 +11,7 @@
 #include "net/base/mime_util.h"
 #include "net/filter/gzip_filter.h"
 #include "net/filter/sdch_filter.h"
+#include "net/url_request/url_request_context.h"
 #include "url/gurl.h"
 
 namespace {
@@ -373,7 +374,8 @@ Filter* Filter::PrependNewFilter(FilterType type_id,
       break;
     case FILTER_TYPE_SDCH:
     case FILTER_TYPE_SDCH_POSSIBLE:
-      if (SdchManager::Global() && SdchManager::sdch_enabled()) {
+      if (filter_context.GetURLRequestContext()->sdch_manager() &&
+          SdchManager::sdch_enabled()) {
         first_filter.reset(
             InitSdchFilter(type_id, filter_context, buffer_size));
       }