Eliminate unused url mapping parameter in dartutils

runtime/vm/debugger_test.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // TODO(zra): Remove when tests are ready to enable.
 #include "platform/globals.h"
 #if !defined(TARGET_ARCH_ARM64)
 
 #include "vm/debugger.h"
 #include "vm/unit_test.h"
@@ skipping 31 matching lines @@
   {
     JSONStream js;
     {
       JSONArray jsarr(&js);
       debugger->PrintBreakpointsToJSONArray(&jsarr);
     }
     EXPECT_STREQ(
        "[{\"type\":\"Breakpoint\",\"id\":2,"
          "\"enabled\":true,\"resolved\":false,"
          "\"location\":{\"type\":\"Location\","
-                       "\"script\":\"dart:test-lib\",\"tokenPos\":14}},"
+                       "\"script\":\"test-lib\",\"tokenPos\":14}},"
         "{\"type\":\"Breakpoint\",\"id\":1,"
          "\"enabled\":true,\"resolved\":false,"
          "\"location\":{\"type\":\"Location\","
-                       "\"script\":\"dart:test-lib\",\"tokenPos\":5}}]",
+                       "\"script\":\"test-lib\",\"tokenPos\":5}}]",
        js.ToCString());
   }
 }
 
 
 static bool saw_paused_event = false;
 
 static void InspectPausedEvent(Dart_IsolateId isolate_id,
                                intptr_t bp_id,
                                const Dart_CodeLocation& loc) {
@@ skipping 37 matching lines @@
   EXPECT_VALID(result);
   EXPECT(Dart_IsString(result));
 
   // We ran the code in InspectPausedEvent.
   EXPECT(saw_paused_event);
 }
 
 }  // namespace dart
 
 #endif  // !defined(TARGET_ARCH_ARM64)