Hack to make tests work if out is a symlink: see if the current dir is the source root.

chrome/test/memory_test/memory_test.cc

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
@@ skipping 30 matching lines @@
     // Use the playback cache, but don't use playback events.
     launch_arguments_.AppendSwitch(switches::kPlaybackMode);
     launch_arguments_.AppendSwitch(switches::kNoEvents);
 
     // Get the specified user data dir (optional)
     FilePath profile_dir = FilePath::FromWStringHack(
       CommandLine::ForCurrentProcess()->GetSwitchValue(switches::kUserDataDir));
 
     if (profile_dir.empty()) {
       // Compute the user-data-dir which contains our test cache.
-      PathService::Get(base::DIR_EXE, &profile_dir);
-      profile_dir = profile_dir.DirName();
-      profile_dir = profile_dir.DirName();
+      PathService::Get(base::DIR_SOURCE_ROOT, &profile_dir);
       profile_dir = profile_dir.AppendASCII("data");
       profile_dir = profile_dir.AppendASCII("memory_test");
       profile_dir = profile_dir.AppendASCII("general_mix");
 
       if (!SetupTempDirectory(profile_dir)) {
         // There isn't really a way to fail gracefully here.
         // Neither this constuctor nor the SetUp() method return
         // status to the caller.  So, just fall through using the
         // default profile and log this.  The failure will be
         // obvious.
@@ skipping 366 matching lines @@
 
 TEST_F(MemoryTest, FiveTabTest) {
   RunTest("5t", 5);
 }
 
 TEST_F(MemoryTest, TwelveTabTest) {
   RunTest("12t", 12);
 }
 
 }  // namespace