Add chrome::DIR_LAYOUT_TESTS to PathService::Get

chrome/common/chrome_paths.h

Index: chrome/common/chrome_paths.h
diff --git a/chrome/common/chrome_paths.h b/chrome/common/chrome_paths.h
index 4eeeaef282e07390562f6910bc2725f79964d67b..c6edfb357c30af58485cf295843627a25d2c37dd 100644
--- a/chrome/common/chrome_paths.h
+++ b/chrome/common/chrome_paths.h
@@ -100,6 +100,14 @@ enum {
   DIR_GEN_TEST_DATA,            // Directory where generated test data resides.
   DIR_TEST_DATA,                // Directory where unit test data resides.
   DIR_TEST_TOOLS,               // Directory where unit test tools reside.
+  DIR_LAYOUT_TESTS,             // Returns the LayoutTests path for layout
+                                // tests. For the current git workflow, it
+                                // returns
+                                //   third_party/WebKit/LayoutTests
+                                // On svn workflow (including build machines)
+                                // and older git workflow, it returns
+                                //   chrome/test/data/layout_tests/LayoutTests
+                                // See, http://crbug.com/105104.
 
   PATH_END
 };