browser: implement multiple permission requesting

android_webview/browser/aw_permission_manager.h

Index: android_webview/browser/aw_permission_manager.h
diff --git a/android_webview/browser/aw_permission_manager.h b/android_webview/browser/aw_permission_manager.h
index 6dd954e021be06d23fb10d204f29bc2547887ddf..38a052fd1ebcea1c6f8fcd2570c8222ce5135b2a 100644
--- a/android_webview/browser/aw_permission_manager.h
+++ b/android_webview/browser/aw_permission_manager.h
@@ -28,10 +28,14 @@ class AwPermissionManager : public content::PermissionManager {
       const GURL& requesting_origin,
       bool user_gesture,
       const base::Callback<void(content::PermissionStatus)>& callback) override;
-  void CancelPermissionRequest(content::PermissionType permission,
-                               content::RenderFrameHost* render_frame_host,
-                               int request_id,
-                               const GURL& requesting_origin) override;
+  int RequestPermissions(
+    const std::vector<content::PermissionType>& permissions,
+    content::RenderFrameHost* render_frame_host,
+    const GURL& requesting_origin,
+    bool user_gesture,
+    const base::Callback<void(
+        const std::vector<content::PermissionStatus>&)>& callback) override;
+  void CancelPermissionRequest(int request_id) override;
   void ResetPermission(content::PermissionType permission,
                        const GURL& requesting_origin,
                        const GURL& embedding_origin) override;