Remove the old task manager view

chrome/browser/task_manager/task_manager_browsertest_util.h

Index: chrome/browser/task_manager/task_manager_browsertest_util.h
diff --git a/chrome/browser/task_manager/task_manager_browsertest_util.h b/chrome/browser/task_manager/task_manager_browsertest_util.h
index 7f9902a164b3b9993c22194cb9d9fff32df62b1c..c13efb8ae62ed9b55f01243fffb038c6850cdbb6 100644
--- a/chrome/browser/task_manager/task_manager_browsertest_util.h
+++ b/chrome/browser/task_manager/task_manager_browsertest_util.h
@@ -9,13 +9,20 @@
 
 #include "base/strings/string16.h"
 
+// -----------------------------------------------------------------------------
+// DEPRECATED:
+// - This is currently enabled only on MacOSX, and will be removed soon (See
+//   crbug.com/528486).
+// - Please don't add any new stuff here. See the new implementation in
+//   //src/chrome/browser/task_management.
+// -----------------------------------------------------------------------------
+#if !defined(OS_MACOSX)
+#error "The old task manager is deprecated on non-macos platforms."
+#endif  // defined(OS_MACOSX)
+
 namespace task_manager {
 namespace browsertest_util {
 
-// For the old task manager browser tests, we must call this to disable the
-// use of the new implementation and revert back to the old one.
-void EnableOldTaskManager();
-
 // Runs the message loop, observing the task manager, until there are exactly
 // |resource_count| many resources whose titles match the pattern
 // |title_pattern|. The match is done via string_util's base::MatchPattern, so