Reintroduce plumbing for user gesture into permission system.

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 9de09de8965b0f32e795b61e8c06e11327bdcde1..cfabc5f5494ca30ca70901dda5e1c3febfbbe5e9 100644
--- a/android_webview/browser/aw_permission_manager.h
+++ b/android_webview/browser/aw_permission_manager.h
@@ -27,12 +27,14 @@ class AwPermissionManager : public content::PermissionManager {
       content::PermissionType permission,
       content::RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
+      bool user_gesture,
       const base::Callback<void(blink::mojom::PermissionStatus)>& callback)
       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<blink::mojom::PermissionStatus>&)>& callback)
       override;