Make SdchManager per-profile.

net/url_request/url_request_context.cc

Index: net/url_request/url_request_context.cc
diff --git a/net/url_request/url_request_context.cc b/net/url_request/url_request_context.cc
index d6a4d2fc0211ac3602aba49885ca48f8addc44c9..3a9f69de4fa248d82c009d4ecbbf98601a6acb09 100644
--- a/net/url_request/url_request_context.cc
+++ b/net/url_request/url_request_context.cc
@@ -31,6 +31,7 @@ URLRequestContext::URLRequestContext()
       http_transaction_factory_(NULL),
       job_factory_(NULL),
       throttler_manager_(NULL),
+      sdch_manager_(NULL),
       url_requests_(new std::set<const URLRequest*>) {
 }
 
@@ -56,6 +57,7 @@ void URLRequestContext::CopyFrom(const URLRequestContext* other) {
   set_http_transaction_factory(other->http_transaction_factory_);
   set_job_factory(other->job_factory_);
   set_throttler_manager(other->throttler_manager_);
+  set_sdch_manager(other->sdch_manager_);
   set_http_user_agent_settings(other->http_user_agent_settings_);
 }