Add support for time based deletion of browsing data on iOS

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 33f4160888e5f9877fddc237fde1d8fc2bf17544..6e22ca6bb0dab71e9e3bd89133e2760c6a93e47e 100644
--- a/ios/crnet/crnet_environment.mm
+++ b/ios/crnet/crnet_environment.mm
@@ -473,8 +473,8 @@ void CrNetEnvironment::InitializeOnNetworkThread() {
       "data", base::WrapUnique(new net::DataProtocolHandler));
 #if !defined(DISABLE_FILE_SUPPORT)
   job_factory->SetProtocolHandler(
-      "file", base::WrapUnique(
-                  new net::FileProtocolHandler(file_thread_->task_runner())));
+      "file",
+      base::MakeUnique<net::FileProtocolHandler>(file_thread_->task_runner()));
 #endif   // !defined(DISABLE_FILE_SUPPORT)
   main_context_->set_job_factory(job_factory);
 
@@ -493,7 +493,7 @@ std::string CrNetEnvironment::user_agent() {
 
 void CrNetEnvironment::ClearCache(ClearCacheCallback callback) {
   PostToNetworkThread(
-      FROM_HERE,
-      base::Bind(&net::ClearHttpCache, main_context_getter_,
-                 network_io_thread_->task_runner(), base::BindBlock(callback)));
+      FROM_HERE, base::Bind(&net::ClearHttpCache, main_context_getter_,
+                            network_io_thread_->task_runner(), base::Time(),
+                            base::Time::Max(), base::BindBlock(callback)));
 }