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

chrome/browser/apps/app_browsertest.cc

Index: chrome/browser/apps/app_browsertest.cc
diff --git a/chrome/browser/apps/app_browsertest.cc b/chrome/browser/apps/app_browsertest.cc
index 578c1549e23fd9bf2feeae0ce4d6bebb9ab06346..e0ba814e621f71233446ac29908ec2628a4a3391 100644
--- a/chrome/browser/apps/app_browsertest.cc
+++ b/chrome/browser/apps/app_browsertest.cc
@@ -44,6 +44,7 @@
 #include "extensions/browser/notification_types.h"
 #include "extensions/browser/pref_names.h"
 #include "extensions/common/api/app_runtime.h"
+#include "extensions/test/result_catcher.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "url/gurl.h"
 
@@ -1086,7 +1087,7 @@ IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest,
 #define MAYBE_Messaging Messaging
 #endif
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, MAYBE_Messaging) {
-  ExtensionApiTest::ResultCatcher result_catcher;
+  ResultCatcher result_catcher;
   LoadAndLaunchPlatformApp("messaging/app2", "Ready");
   LoadAndLaunchPlatformApp("messaging/app1", "Launched");
   EXPECT_TRUE(result_catcher.GetNextResult());
@@ -1302,7 +1303,7 @@ IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, ReinstallDataCleanup) {
     ASSERT_TRUE(extension);
     extension_id = extension->id();
 
-    ExtensionApiTest::ResultCatcher result_catcher;
+    ResultCatcher result_catcher;
     EXPECT_TRUE(result_catcher.GetNextResult());
   }
 
@@ -1315,7 +1316,7 @@ IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, ReinstallDataCleanup) {
     ASSERT_TRUE(extension);
     ASSERT_EQ(extension_id, extension->id());
 
-    ExtensionApiTest::ResultCatcher result_catcher;
+    ResultCatcher result_catcher;
     EXPECT_TRUE(result_catcher.GetNextResult());
   }
 }