Disable SDCH by Default

ios/chrome/browser/browser_state/off_the_record_chrome_browser_state_io_data.mm

Index: ios/chrome/browser/browser_state/off_the_record_chrome_browser_state_io_data.mm
diff --git a/ios/chrome/browser/browser_state/off_the_record_chrome_browser_state_io_data.mm b/ios/chrome/browser/browser_state/off_the_record_chrome_browser_state_io_data.mm
index 4eb9abd265dfee1a032db1512771a02394d86a3a..f7133e6b4418b7a645e6740dbb26bbc47c68420b 100644
--- a/ios/chrome/browser/browser_state/off_the_record_chrome_browser_state_io_data.mm
+++ b/ios/chrome/browser/browser_state/off_the_record_chrome_browser_state_io_data.mm
@@ -215,11 +215,6 @@ void OffTheRecordChromeBrowserStateIOData::InitializeInternal(
   main_job_factory_ = SetUpJobFactoryDefaults(std::move(main_job_factory),
                                               main_context->network_delegate());
   main_context->set_job_factory(main_job_factory_.get());
-
-  // Setup SDCH for this profile.
-  sdch_manager_.reset(new net::SdchManager);
-  sdch_policy_.reset(new net::SdchOwner(sdch_manager_.get(), main_context));
-  main_context->set_sdch_manager(sdch_manager_.get());
 }
 
 ChromeBrowserStateIOData::AppRequestContext*