DevTools: improve DevTools file watcher to send added and removed paths

chrome/browser/devtools/devtools_ui_bindings.cc

Index: chrome/browser/devtools/devtools_ui_bindings.cc
diff --git a/chrome/browser/devtools/devtools_ui_bindings.cc b/chrome/browser/devtools/devtools_ui_bindings.cc
index fd0690afd29cde123e98efa4e6caaaeb814999cc..9f8db2ee84647b6753f8d802f9b91b55a00ebc07 100644
--- a/chrome/browser/devtools/devtools_ui_bindings.cc
+++ b/chrome/browser/devtools/devtools_ui_bindings.cc
@@ -977,12 +977,19 @@ void DevToolsUIBindings::FileSystemRemoved(
 }
 
 void DevToolsUIBindings::FilePathsChanged(
-    const std::vector<std::string>& file_paths) {
-  base::ListValue list;
-  for (auto path : file_paths)
-    list.AppendString(path);
-  CallClientFunction("DevToolsAPI.fileSystemFilesChanged",
-                     &list, NULL, NULL);
+    const std::vector<std::string>& changed_paths,
+    const std::vector<std::string>& added_paths,
+    const std::vector<std::string>& removed_paths) {
+  base::ListValue added, changed, removed;
+  for (auto path : changed_paths)
+    changed.AppendString(path);
+  for (auto path : added_paths)
+    added.AppendString(path);
+  for (auto path : removed_paths)
+    removed.AppendString(path);
+
+  CallClientFunction("DevToolsAPI.fileSystemFilesChanged", &changed, &added,
+                     &removed);
 }
 
 void DevToolsUIBindings::IndexingTotalWorkCalculated(