Support for DIR_SOURCE_ROOT in a case of WebKit-only checkout....

base/base_paths_win.cc

 // Copyright (c) 2006-2008 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/base_paths_win.h"
 
 #include <windows.h>
 #include <shlobj.h>
 
 #include "base/file_path.h"
@@ skipping 87 matching lines @@
       file_util::UpOneDirectory(&wstring_path);
       file_util::AppendToPath(&wstring_path, L"LocalLow");
       cur = FilePath(wstring_path);
       break;
     case base::DIR_LOCAL_APP_DATA:
       if (FAILED(SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA, NULL,
                                  SHGFP_TYPE_CURRENT, system_buffer)))
         return false;
       cur = FilePath(system_buffer);
       break;
-    case base::DIR_SOURCE_ROOT:
+    case base::DIR_SOURCE_ROOT: {
+      FilePath executableDir;
       // On Windows, unit tests execute two levels deep from the source root.
       // For example:  chrome/{Debug|Release}/ui_tests.exe
-      PathService::Get(base::DIR_EXE, &cur);
-      cur = cur.DirName().DirName();
+      PathService::Get(base::DIR_EXE, &executableDir);
+      cur = executableDir.DirName().DirName();
+      FilePath checkedPath =
+          cur.Append(FILE_PATH_LITERAL("base/base_paths_win.cc"));
+      if (!file_util::PathExists(checkedPath)) {
+        // Check for WebKit-only checkout. Executable files are put into
+        // WebKit/WebKit/chromium/{Debug|Relese}, and we should return
+        // WebKit/WebKit/chromium.
+        cur = executableDir.DirName();
+      }
       break;
+    }
     default:
       return false;
   }
 
   *result = cur;
   return true;
 }
 
 }  // namespace base