Convert ChromeViewHostMsg_UpdatedCacheStats to use mojo.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index fce8dc8fe0d7c20d9b8c43cc3f0679efd6b84dae..5a18d331b35d3e7c473a174fc3d3185d0686fb6a 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -26,6 +26,7 @@
 #include "content/browser/renderer_host/frame_sink_provider_impl.h"
 #include "content/browser/renderer_host/offscreen_canvas_provider_impl.h"
 #include "content/browser/webrtc/webrtc_eventlog_host.h"
+#include "content/common/associated_interface_registry_impl.h"
 #include "content/common/associated_interfaces.mojom.h"
 #include "content/common/content_export.h"
 #include "content/common/indexed_db/indexed_db.mojom.h"
@@ -344,6 +345,8 @@ class CONTENT_EXPORT RenderProcessHostImpl
       const std::string& name,
       mojom::AssociatedInterfaceAssociatedRequest request) override;
 
+  void BindRouteProvider(mojom::RouteProviderAssociatedRequest request);
+
   void CreateMusGpuRequest(ui::mojom::GpuRequest request);
   void CreateOffscreenCanvasProvider(
       blink::mojom::OffscreenCanvasProviderRequest request);
@@ -458,6 +461,11 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // delete ourselves.
   IDMap<IPC::Listener*> listeners_;
 
+  // Mojo interfaces provided to the child process are registered here if they
+  // need consistent delivery ordering with legacy IPC, and are process-wide in
+  // nature (e.g. metrics, memory usage).
+  std::unique_ptr<AssociatedInterfaceRegistryImpl> associated_interfaces_;
+
   mojo::AssociatedBinding<mojom::RouteProvider> route_provider_binding_;
   mojo::AssociatedBindingSet<mojom::AssociatedInterfaceProvider, int32_t>
       associated_interface_provider_bindings_;