[DevTools] Rework DevToolsSession interaction with domain handlers.

content/browser/devtools/protocol/network_handler.h

Index: content/browser/devtools/protocol/network_handler.h
diff --git a/content/browser/devtools/protocol/network_handler.h b/content/browser/devtools/protocol/network_handler.h
index b588a1601ac159ad6ab4944f72a77fb96a47cc73..d02f9687f15d4a52a7a95486bcab993617d11914 100644
--- a/content/browser/devtools/protocol/network_handler.h
+++ b/content/browser/devtools/protocol/network_handler.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NETWORK_HANDLER_H_
 
 #include "base/macros.h"
+#include "content/browser/devtools/protocol/devtools_domain_handler.h"
 #include "content/browser/devtools/protocol/network.h"
 #include "net/cookies/canonical_cookie.h"
 
@@ -15,13 +16,14 @@ class RenderFrameHostImpl;
 
 namespace protocol {
 
-class NetworkHandler : public Network::Backend {
+class NetworkHandler : public DevToolsDomainHandler,
+                       public Network::Backend {
  public:
   NetworkHandler();
   ~NetworkHandler() override;
 
-  void SetRenderFrameHost(RenderFrameHostImpl* host);
-  void Wire(UberDispatcher*);
+  void Wire(UberDispatcher* dispatcher) override;
+  void SetRenderFrameHost(RenderFrameHostImpl* host) override;
 
   Response Enable(Maybe<int> max_total_size,
                   Maybe<int> max_resource_size) override;