Fix various grit python paths.

chrome/tools/build/repack_locales.py

Index: chrome/tools/build/repack_locales.py
diff --git a/chrome/tools/build/repack_locales.py b/chrome/tools/build/repack_locales.py
index dc82d7d474e529eb711c3523b04fdf0fe18eb98c..7708d07ec829b996abf962d0281b60d1dc99de31 100755
--- a/chrome/tools/build/repack_locales.py
+++ b/chrome/tools/build/repack_locales.py
@@ -14,8 +14,10 @@ import optparse
 import os
 import sys
 
-sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', '..',
-                             'tools', 'grit'))
+# Prepend the grit module from the source tree so it takes precedence over other
+# grit versions that might present in the search path.
+sys.path.insert(1, os.path.join(os.path.dirname(__file__), '..', '..', '..',
+                                'tools', 'grit'))
 from grit.format import data_pack
 
 # The gyp "branding" variable.