Make GetURLForDebugging return a const GURL

chrome/common/resource_dispatcher_unittest.cc

Index: chrome/common/resource_dispatcher_unittest.cc
diff --git a/chrome/common/resource_dispatcher_unittest.cc b/chrome/common/resource_dispatcher_unittest.cc
index 39464ee67bddc1caf3abb2df0520c05fb51a8e51..bfdbad5ffe7122537e41d282272067e732924b57 100644
--- a/chrome/common/resource_dispatcher_unittest.cc
+++ b/chrome/common/resource_dispatcher_unittest.cc
@@ -57,8 +57,8 @@ class TestRequestCallback : public ResourceLoaderBridge::Peer {
     complete_ = true;
   }
 
-  virtual std::string GetURLForDebugging() {
-    return std::string();
+  virtual GURL GetURLForDebugging() const {
+    return GURL();
   }
 
   const std::string& data() const {
@@ -259,8 +259,8 @@ class DeferredResourceLoadingTest : public ResourceDispatcherTest,
                                   const std::string& security_info) {
   }
 
-  virtual std::string GetURLForDebugging() {
-    return std::string();
+  virtual GURL GetURLForDebugging() const {
+    return GURL();
   }
 
  protected: