Revert of [DevTools] Migrate security handler to new generator.

content/browser/devtools/render_frame_devtools_agent_host.cc

Index: content/browser/devtools/render_frame_devtools_agent_host.cc
diff --git a/content/browser/devtools/render_frame_devtools_agent_host.cc b/content/browser/devtools/render_frame_devtools_agent_host.cc
index c7693a56efbea27884057ad5358cd491d87b172f..b36ae175ab986fbfaa701752f89648803eda904c 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.cc
+++ b/content/browser/devtools/render_frame_devtools_agent_host.cc
@@ -395,6 +395,7 @@
     RenderFrameHostImpl* host)
     : DevToolsAgentHostImpl(base::GenerateGUID()),
       input_handler_(new devtools::input::InputHandler()),
+      security_handler_(nullptr),
       service_worker_handler_(
           new devtools::service_worker::ServiceWorkerHandler()),
       storage_handler_(new devtools::storage::StorageHandler()),
@@ -411,6 +412,11 @@
   dispatcher->SetStorageHandler(storage_handler_.get());
   dispatcher->SetTargetHandler(target_handler_.get());
 
+  if (!host->GetParent()) {
+    security_handler_.reset(new devtools::security::SecurityHandler());
+    dispatcher->SetSecurityHandler(security_handler_.get());
+  }
+
   SetPending(host);
   CommitPending();
   WebContentsObserver::Observe(WebContents::FromRenderFrameHost(host));
@@ -504,12 +510,6 @@
 
   schema_handler_.reset(new protocol::SchemaHandler());
   schema_handler_->Wire(session()->dispatcher());
-
-  if (!frame_tree_node_->parent()) {
-    security_handler_.reset(new protocol::SecurityHandler());
-    security_handler_->Wire(session()->dispatcher());
-    security_handler_->SetRenderFrameHost(handlers_frame_host_);
-  }
 
   tracing_handler_.reset(new protocol::TracingHandler(
       protocol::TracingHandler::Renderer,
@@ -543,10 +543,6 @@
   }
   schema_handler_->Disable();
   schema_handler_.reset();
-  if (security_handler_) {
-    security_handler_->Disable();
-    security_handler_.reset();
-  }
   tracing_handler_->Disable();
   tracing_handler_.reset();