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

chrome/browser/resources/pdf/pdf_extension_test.cc

Index: chrome/browser/resources/pdf/pdf_extension_test.cc
diff --git a/chrome/browser/resources/pdf/pdf_extension_test.cc b/chrome/browser/resources/pdf/pdf_extension_test.cc
index 4233d74132623e3513aa40e35b0c9bedcbc1fd31..775fcc834eef770e1d0b99043fc1a0ddf449b75f 100644
--- a/chrome/browser/resources/pdf/pdf_extension_test.cc
+++ b/chrome/browser/resources/pdf/pdf_extension_test.cc
@@ -13,6 +13,7 @@
 #include "chrome/common/extensions/manifest_handlers/mime_types_handler.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/test/browser_test_utils.h"
+#include "extensions/test/result_catcher.h"
 #include "grit/browser_resources.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
@@ -55,7 +56,7 @@ class PDFExtensionTest : public ExtensionApiTest {
     ASSERT_TRUE(MimeTypesHandler::GetHandler(
         extension)->CanHandleMIMEType("application/pdf"));
 
-    ResultCatcher catcher;
+    extensions::ResultCatcher catcher;
 
     GURL url(embedded_test_server()->GetURL("/pdf/test.pdf"));
     GURL extension_url(