Removing NSS files and USE_OPENSSL flag

ios/crnet/crnet_environment.mm

Index: ios/crnet/crnet_environment.mm
diff --git a/ios/crnet/crnet_environment.mm b/ios/crnet/crnet_environment.mm
index b564111b6094572c861928c7b957db95a43e6b0a..f8c98ed17c945f542e61bec141241cc3d5afa3c5 100644
--- a/ios/crnet/crnet_environment.mm
+++ b/ios/crnet/crnet_environment.mm
@@ -26,7 +26,6 @@
 #include "base/threading/worker_pool.h"
 #include "components/prefs/json_pref_store.h"
 #include "components/prefs/pref_filter.h"
-#include "crypto/nss_util.h"
 #include "ios/crnet/sdch_owner_pref_storage.h"
 #include "ios/net/cookies/cookie_store_ios.h"
 #include "ios/net/crn_http_protocol_handler.h"
@@ -38,7 +37,6 @@
 #include "net/base/network_change_notifier.h"
 #include "net/base/sdch_manager.h"
 #include "net/cert/cert_verifier.h"
-#include "net/cert_net/nss_ocsp.h"
 #include "net/cookies/cookie_store.h"
 #include "net/http/http_auth_handler_factory.h"
 #include "net/http/http_cache.h"
@@ -154,14 +152,6 @@ void CrNetEnvironment::Initialize() {
   url::Initialize();
   base::CommandLine::Init(0, nullptr);
 
-#if defined(USE_NSS_VERIFIER)
-  // This needs to happen on the main thread. NSPR's initialization sets up its
-  // memory allocator; if this is not done before other threads are created,
-  // this initialization can race to cause accidental free/allocation
-  // mismatches.
-  crypto::EnsureNSPRInit();
-#endif
-
   // Without doing this, StatisticsRecorder::FactoryGet() leaks one histogram
   // per call after the first for a given name.
   base::StatisticsRecorder::Initialize();
@@ -292,9 +282,6 @@ void CrNetEnvironment::Install() {
   proxy_config_service_ = net::ProxyService::CreateSystemProxyConfigService(
       network_io_thread_->task_runner(), nullptr);
 
-#if defined(USE_NSS_VERIFIER)
-  net::SetURLRequestContextForNSSHttpIO(main_context_.get());
-#endif
   main_context_getter_ = new CrNetURLRequestContextGetter(
       main_context_.get(), network_io_thread_->task_runner());
   base::subtle::MemoryBarrier();
@@ -312,9 +299,6 @@ void CrNetEnvironment::InstallIntoSessionConfiguration(
 
 CrNetEnvironment::~CrNetEnvironment() {
   net::HTTPProtocolHandlerDelegate::SetInstance(nullptr);
-#if defined(USE_NSS_VERIFIER)
-  net::SetURLRequestContextForNSSHttpIO(nullptr);
-#endif
 }
 
 net::URLRequestContextGetter* CrNetEnvironment::GetMainContextGetter() {