Add a mojo channel for frame messages.

content/public/app/mojo/content_renderer_manifest.json

 {
   "name": "content_renderer",
   "display_name": "Content (renderer process)",
   "interface_provider_specs": {
     "service_manager:connector": {
       "provides": {
         "browser": [
           "content::mojom::Child",
           "content::mojom::EmbeddedWorkerInstanceClient",
           "content::mojom::EmbeddedWorkerSetup",
@@ skipping 25 matching lines @@
         ]
       }
     },
     "navigation:frame": {
       "provides": {
         "browser": [
           "blink::mojom::AppBannerController",
           "blink::mojom::EngagementClient",
           "blink::mojom::InstallationService",
           "content::mojom::ImageDownloader",
+          "content::mojom::FrameInputHandler",
           "mojom::MediaDevicesListener"
         ]
       },
       "requires": {
         "content_browser": [ "memory_instrumentation", "renderer" ]
       }
     }
   },
   "required_files" : {
     "v8_natives_data" : [
@@ skipping 13 matching lines @@
     "v8_snapshot_32_data" : [{
       "path": "assets/snapshot_blob_32.bin",
       "platform": "android"
     }],
     "v8_snapshot_64_data" : [{
       "path": "assets/snapshot_blob_64.bin",
       "platform": "android"
     }]
   }
 }