Reintroduce plumbing for user gesture into permission system.

android_webview/browser/aw_permission_manager.cc

Index: android_webview/browser/aw_permission_manager.cc
diff --git a/android_webview/browser/aw_permission_manager.cc b/android_webview/browser/aw_permission_manager.cc
index b86f1a43c0e190bad2f8488667aa7f7752c1a0e1..a428250f940152f3d242bc52f2892e37674f6cf7 100644
--- a/android_webview/browser/aw_permission_manager.cc
+++ b/android_webview/browser/aw_permission_manager.cc
@@ -169,6 +169,7 @@ int AwPermissionManager::RequestPermission(
     PermissionType permission,
     content::RenderFrameHost* render_frame_host,
     const GURL& requesting_origin,
+    bool user_gesture,
     const base::Callback<void(PermissionStatus)>& callback) {
   int render_process_id = render_frame_host->GetProcess()->GetID();
   int render_frame_id = render_frame_host->GetRoutingID();
@@ -262,6 +263,7 @@ int AwPermissionManager::RequestPermissions(
     const std::vector<PermissionType>& permissions,
     content::RenderFrameHost* render_frame_host,
     const GURL& requesting_origin,
+    bool user_gesture,
     const base::Callback<void(
         const std::vector<PermissionStatus>&)>& callback) {
   NOTIMPLEMENTED() << "RequestPermissions has not been implemented in WebView";