1 files changed, 28 insertions, 0 deletions
diff --git a/chromium/content/browser/devtools/protocol/handler_helpers.cc b/chromium/content/browser/devtools/protocol/handler_helpers.cc
new file mode 100644
index 00000000000..7fbd42ddd61
--- /dev/null
+++ b/chromium/content/browser/devtools/protocol/handler_helpers.cc
@@ -0,0 +1,28 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/devtools/protocol/handler_helpers.h"
+#include "content/browser/frame_host/frame_tree_node.h"
+
+namespace content {
+
+namespace protocol {
+
+FrameTreeNode* FrameTreeNodeFromDevToolsFrameToken(
+    FrameTreeNode* root,
+    const std::string& devtools_frame_token) {
+  if (root->devtools_frame_token().ToString() == devtools_frame_token) {
+    return root;
+  } else {
+    for (FrameTreeNode* node : root->frame_tree()->SubtreeNodes(root)) {
+      if (node->devtools_frame_token().ToString() == devtools_frame_token) {
+        return node;
+      }
+    }
+  }
+  return nullptr;
+}
+
+}  // namespace protocol
+}  // namespace content