[Autofill]Enable mojo AutofillDriver for android_webview.

android_webview/browser/aw_content_browser_client.h

Index: android_webview/browser/aw_content_browser_client.h
diff --git a/android_webview/browser/aw_content_browser_client.h b/android_webview/browser/aw_content_browser_client.h
index 2cea37a28434ea2ba347b01844ae6135ceca8278..a47c3a0ffd996a5d979be561c775c1fa1fc358e5 100644
--- a/android_webview/browser/aw_content_browser_client.h
+++ b/android_webview/browser/aw_content_browser_client.h
@@ -136,6 +136,9 @@ class AwContentBrowserClient : public content::ContentBrowserClient {
   ScopedVector<content::NavigationThrottle> CreateThrottlesForNavigation(
       content::NavigationHandle* navigation_handle) override;
   content::DevToolsManagerDelegate* GetDevToolsManagerDelegate() override;
+  void RegisterRenderFrameMojoInterfaces(
+      service_manager::InterfaceRegistry* registry,
+      content::RenderFrameHost* render_frame_host) override;
 
  private:
   // Android WebView currently has a single global (non-off-the-record) browser