Updated HandleExternalProtocol signature in BraveContentBrowserClient.

Chromium change:

https://chromium.googlesource.com/chromium/src/+/b6042ed37a482983111cdf1f9d0b09ffe972c309

commit b6042ed37a482983111cdf1f9d0b09ffe972c309
Author: Clark DuVall <cduvall@chromium.org>
Date:   Mon Jul 15 17:20:45 2019 +0000

    Support HandleExternalProtocol on UI thread

    This allows HandleExternalProtocol to be used on the UI thread in
    android_webview. This is part of migrating the navigation loader to the
    UI thread.

    Bug: 824840

browser/brave_content_browser_client.cc

@@ -207,8 +207,7 @@ bool BraveContentBrowserClient::HandleExternalProtocol(
     bool is_main_frame,
     ui::PageTransition page_transition,
     bool has_user_gesture,
-    network::mojom::URLLoaderFactoryRequest* factory_request,
-    network::mojom::URLLoaderFactory*& out_factory) {  // NOLINT
+    network::mojom::URLLoaderFactoryPtr* out_factory) {
 #if BUILDFLAG(ENABLE_BRAVE_WEBTORRENT)
   if (webtorrent::HandleMagnetProtocol(url, web_contents_getter,
                                        page_transition, has_user_gesture)) {
@@ -225,7 +224,7 @@ bool BraveContentBrowserClient::HandleExternalProtocol(
 
   return ChromeContentBrowserClient::HandleExternalProtocol(
       url, web_contents_getter, child_id, navigation_data, is_main_frame,
-      page_transition, has_user_gesture, factory_request, out_factory);
+      page_transition, has_user_gesture, out_factory);
 }
 
 base::Optional<service_manager::Manifest>

browser/brave_content_browser_client.h

@@ -50,8 +50,7 @@ class BraveContentBrowserClient : public ChromeContentBrowserClient {
       bool is_main_frame,
       ui::PageTransition page_transition,
       bool has_user_gesture,
-      network::mojom::URLLoaderFactoryRequest* factory_request,
-      network::mojom::URLLoaderFactory*& out_factory) override;  // NOLINT
+      network::mojom::URLLoaderFactoryPtr* out_factory) override;
 
   content::ContentBrowserClient::AllowWebBluetoothResult AllowWebBluetooth(
       content::BrowserContext* browser_context,