DevTools: Overrides: Rebind to the latest network UISourceCode

Bug: 760316
Change-Id: I2e1a5b06e1b3b5e2e1e3151ca2299172b789ffa5
Reviewed-on: https://chromium-review.googlesource.com/827941Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Joel Einbinder <einbinder@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526582}

third_party/WebKit/Source/devtools/front_end/persistence/NetworkPersistenceManager.js

@@ -211,8 +211,10 @@ Persistence.NetworkPersistenceManager = class extends Common.Object {
    * @param {!Workspace.UISourceCode} fileSystemUISourceCode
    */
   async _bind(networkUISourceCode, fileSystemUISourceCode) {
-    if (networkUISourceCode[this._bindingSymbol] || fileSystemUISourceCode[this._bindingSymbol])
-      return;
+    if (networkUISourceCode[this._bindingSymbol])
+      this._unbind(networkUISourceCode);
+    if (fileSystemUISourceCode[this._bindingSymbol])
+      this._unbind(fileSystemUISourceCode);
     var binding = new Persistence.PersistenceBinding(networkUISourceCode, fileSystemUISourceCode, true);
     networkUISourceCode[this._bindingSymbol] = binding;
     fileSystemUISourceCode[this._bindingSymbol] = binding;