<tools/grit> GRIT: Allow grd files outside of chromium source dir.

When replacing substrings with values from a dictionary,
the replacements should not be truncated to the length of src_root_dir.

If the basename does not exist as a key in the resource_ids file,
then fall back to an absolute path.

The precedence is like:
file in chromium > file basename > absolute file name.

THIS SHOULD BE UPSTREAMABLE.

Change-Id: I7d1da8c04515807000742aac4a6fa4db7616fd13
Reviewed-by: Zeno Albisser <[email protected]>
Reviewed-by: Andras Becsi <[email protected]>

Author: zenoalbisser

chromium/tools/grit/grit/node/misc.py

@@ -49,6 +49,7 @@ def _ReadFirstIdsFromFile(filename, defines):
   def ReplaceVariable(matchobj):
     for key, value in defines.iteritems():
       if matchobj.group(1) == key:
+        value = os.path.abspath(value)
         return value
     return ''
 
@@ -431,6 +432,11 @@ def AssignFirstIds(self, filename_or_stream, defines):
         abs_filename = os.path.abspath(filename_or_stream)
         if abs_filename[:len(src_root_dir)] != src_root_dir:
           filename = os.path.basename(filename_or_stream)
+          # If the file is not within src_root_dir and the basename is not
+          # found as a key, fall back to using the absolute file name.
+          if not filename in first_ids:
+            filename = abs_filename
+            filename = filename.replace('\\', '/')
         else:
           filename = abs_filename[len(src_root_dir) + 1:]
           filename = filename.replace('\\', '/')