DevTools: [Persistence] guard against multiple UISourceCodes with similar URL

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

Index: third_party/WebKit/Source/devtools/front_end/persistence/Automapping.js
diff --git a/third_party/WebKit/Source/devtools/front_end/persistence/Automapping.js b/third_party/WebKit/Source/devtools/front_end/persistence/Automapping.js
index d656d3a3088458ae743217e61155f524548a0ab2..e6086384fc7d3b456a1a2eeb5b2d1c5ad260cada 100644
--- a/third_party/WebKit/Source/devtools/front_end/persistence/Automapping.js
+++ b/third_party/WebKit/Source/devtools/front_end/persistence/Automapping.js
@@ -153,6 +153,9 @@ Persistence.Automapping = class {
         this._onBindingFailedForTest();
         return;
       }
+      // TODO(lushnikov): remove this check once there's a single uiSourceCode per url. @see crbug.com/670180
+      if (binding.network[Persistence.Automapping._binding] || binding.fileSystem[Persistence.Automapping._binding])
+        return;
 
       this._bindings.add(binding);
       binding.network[Persistence.Automapping._binding] = binding;