[Autofill] Migrate ContentAutofillDriver<-->AutofillAgent IPCs to mojo.

components/autofill/content/browser/content_autofill_driver_factory.cc

Index: components/autofill/content/browser/content_autofill_driver_factory.cc
diff --git a/components/autofill/content/browser/content_autofill_driver_factory.cc b/components/autofill/content/browser/content_autofill_driver_factory.cc
index 3e614dcb94aa25f97da20c43108472d90b863315..6f9e9899cd16fa7fe1e3e819ce31111681b8f664 100644
--- a/components/autofill/content/browser/content_autofill_driver_factory.cc
+++ b/components/autofill/content/browser/content_autofill_driver_factory.cc
@@ -16,7 +16,6 @@
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
-#include "ipc/ipc_message_macros.h"
 
 namespace autofill {
 
@@ -75,8 +74,9 @@ void ContentAutofillDriverFactory::BindAutofillDriver(
     return;
 
   ContentAutofillDriver* driver = factory->DriverForFrame(render_frame_host);
-  if (driver)
+  if (driver) {
     driver->BindRequest(std::move(request));
+  }
 }
 
 ContentAutofillDriverFactory::ContentAutofillDriverFactory(
@@ -95,12 +95,6 @@ ContentAutofillDriver* ContentAutofillDriverFactory::DriverForFrame(
   return mapping == frame_driver_map_.end() ? nullptr : mapping->second.get();
 }
 
-bool ContentAutofillDriverFactory::OnMessageReceived(
-    const IPC::Message& message,
-    content::RenderFrameHost* render_frame_host) {
-  return frame_driver_map_[render_frame_host]->HandleMessage(message);
-}
-
 void ContentAutofillDriverFactory::RenderFrameCreated(
     content::RenderFrameHost* render_frame_host) {
   auto insertion_result =