Prevent making real DNS lookups by chrome tests.

chrome/browser/views/find_bar_win_unittest.cc

Index: chrome/browser/views/find_bar_win_unittest.cc
diff --git a/chrome/browser/views/find_bar_win_unittest.cc b/chrome/browser/views/find_bar_win_unittest.cc
index 4ef345c6593f93aa8d8d1961dcf53434703f3da6..f2d2f744b584c629e0e0b76aa974632c9c132343 100644
--- a/chrome/browser/views/find_bar_win_unittest.cc
+++ b/chrome/browser/views/find_bar_win_unittest.cc
@@ -13,6 +13,7 @@
 #include "chrome/common/notification_service.h"
 #include "chrome/test/in_process_browser_test.h"
 #include "chrome/test/ui_test_utils.h"
+#include "net/base/host_resolver_unittest.h"
 
 const std::wstring kFramePage = L"files/find_in_page/frames.html";
 const std::wstring kFrameData = L"files/find_in_page/framedata_general.html";
@@ -79,7 +80,13 @@ typedef enum FindInPageCase { IGNORE_CASE = 0, CASE_SENSITIVE = 1 };
 
 class FindInPageControllerTest : public InProcessBrowserTest {
  public:
-  FindInPageControllerTest() {}
+  FindInPageControllerTest() {
+    host_mapper_ = new net::RuleBasedHostMapper();
+    // Avoid making external DNS lookups. In this test we don't need this
+    // to succeed.
+    host_mapper_->AddSimulatedFailure("*.google.com");
+    scoped_host_mapper_.Init(host_mapper_.get());
+  }
 
  protected:
   int FindInPage(const std::wstring& search_string,
@@ -99,6 +106,10 @@ class FindInPageControllerTest : public InProcessBrowserTest {
     }
     return 0;
   }
+
+ private:
+  scoped_refptr<net::RuleBasedHostMapper> host_mapper_;
+  net::ScopedHostMapper scoped_host_mapper_;
 };
 
 // This test loads a page with frames and starts FindInPage requests