Use extensions::ResultCatcher; delete ExtensionApiTest::ResultCatcher.

chrome/browser/extensions/extension_override_apitest.cc

Index: chrome/browser/extensions/extension_override_apitest.cc
diff --git a/chrome/browser/extensions/extension_override_apitest.cc b/chrome/browser/extensions/extension_override_apitest.cc
index db21578b142984107aed1c6f6988c3bc24ef4aee..b190d2e890720f01615d08d040f44cb72e0b4395 100644
--- a/chrome/browser/extensions/extension_override_apitest.cc
+++ b/chrome/browser/extensions/extension_override_apitest.cc
@@ -16,6 +16,7 @@
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/common/constants.h"
+#include "extensions/test/result_catcher.h"
 
 using content::WebContents;
 
@@ -50,7 +51,7 @@ class ExtensionOverrideTest : public ExtensionApiTest {
 IN_PROC_BROWSER_TEST_F(ExtensionOverrideTest, OverrideNewtab) {
   ASSERT_TRUE(RunExtensionTest("override/newtab")) << message_;
   {
-    ResultCatcher catcher;
+    extensions::ResultCatcher catcher;
     // Navigate to the new tab page.  The overridden new tab page
     // will call chrome.test.notifyPass() .
     ui_test_utils::NavigateToURL(browser(), GURL("chrome://newtab/"));
@@ -95,7 +96,7 @@ IN_PROC_BROWSER_TEST_F(ExtensionOverrideTest, MAYBE_OverrideNewtabIncognito) {
 IN_PROC_BROWSER_TEST_F(ExtensionOverrideTest, MAYBE_OverrideHistory) {
   ASSERT_TRUE(RunExtensionTest("override/history")) << message_;
   {
-    ResultCatcher catcher;
+    extensions::ResultCatcher catcher;
     // Navigate to the history page.  The overridden history page
     // will call chrome.test.notifyPass() .
     ui_test_utils::NavigateToURL(browser(), GURL("chrome://history/"));