Remove vestigal SDCH stuff in IOThread.

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index 3a9860cc4ade8019e299dfadb7ae471adf3a96e9..2374d916c9fca2e30b19167a8a89890e60d0c92e 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -48,7 +48,6 @@
 #include "content/public/browser/cookie_store_factory.h"
 #include "net/base/host_mapping_rules.h"
 #include "net/base/net_util.h"
-#include "net/base/sdch_manager.h"
 #include "net/cert/cert_verifier.h"
 #include "net/cert/cert_verify_proc.h"
 #include "net/cert/ct_known_logs.h"
@@ -421,7 +420,6 @@ IOThread::IOThread(
     : net_log_(net_log),
       extension_event_router_forwarder_(extension_event_router_forwarder),
       globals_(NULL),
-      sdch_manager_(NULL),
       is_spdy_disabled_by_policy_(false),
       weak_factory_(this),
       creation_time_(base::TimeTicks::Now()) {
@@ -699,8 +697,6 @@ void IOThread::InitAsync() {
   globals_->proxy_script_fetcher_context.reset(
       ConstructProxyScriptFetcherContext(globals_, net_log_));
 
-  sdch_manager_ = new net::SdchManager();
-
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   // Start observing Keychain events. This needs to be done on the UI thread,
   // as Keychain services requires a CFRunLoop.
@@ -728,9 +724,6 @@ void IOThread::InitAsync() {
 void IOThread::CleanUp() {
   base::debug::LeakTracker<SafeBrowsingURLRequestContext>::CheckForLeaks();
 
-  delete sdch_manager_;
-  sdch_manager_ = NULL;
-
 #if defined(USE_NSS) || defined(OS_IOS)
   net::ShutdownNSSHttpIO();
 #endif
@@ -1058,10 +1051,6 @@ void IOThread::InitSystemRequestContextOnIOThread() {
       new net::URLRequestJobFactoryImpl());
   globals_->system_request_context.reset(
       ConstructSystemRequestContext(globals_, net_log_));
-
-  sdch_manager_->set_sdch_fetcher(
-      new SdchDictionaryFetcher(

[mef, 2014/06/18 17:30:30]

So, where is fetcher now?

[Randy Smith (Not in Mondays), 2014/06/18 17:39:25]

http://src.chromium.org/viewvc/chrome/trunk/src/chrome/browser/profiles/profi...,
line 537.  It's put together with the rest of the chrome per-profile structures.
 Also see https://codereview.chromium.org/298063006 (which is where this cleanup
should have been :-}).

-          sdch_manager_, system_url_request_context_getter_.get()));
 }
 
 void IOThread::UpdateDnsClientEnabled() {