[Android] Temporarily suppress RTL start&end check error.

build/android/gyp/generate_v14_compatible_resources.py

 #!/usr/bin/env python
 #
 # Copyright 2013 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.
 
 """Convert Android xml resources to API 14 compatible.
 
 There are two reasons that we cannot just use API 17 attributes,
 so we are generating another set of resources by this script.
@@ skipping 36 matching lines @@
                      'layout_marginEnd' : 'layout_marginRight',
                      'layout_alignParentEnd' : 'layout_alignParentRight',
                      'layout_toEndOf' : 'layout_toRightOf'}
 
 ATTRIBUTES_TO_MAP = dict(['android:' + k, 'android:' + v] for k, v
                          in ATTRIBUTES_TO_MAP.iteritems())
 
 ATTRIBUTES_TO_MAP_REVERSED = dict([v, k] for k, v
                                   in ATTRIBUTES_TO_MAP.iteritems())
 
+# Attributes that are allowed to use if both are used in the same element.
+ALLOWED_ATTRIBUTE_PAIRS = {'layout_marginStart' : 'layout_marginLeft',
+                           'layout_marginEnd' : 'layout_marginRight'}
+
+ALLOWED_ATTRIBUTE_PAIRS = dict(['android:' + k, 'android:' + v] for k, v
+                               in ALLOWED_ATTRIBUTE_PAIRS.iteritems())
+
+ALLOWED_ATTRIBUTE_PAIRS.update(dict([v, k] for k, v
+                               in ALLOWED_ATTRIBUTE_PAIRS.iteritems()))
 
 def IterateXmlElements(node):
   """minidom helper function that iterates all the element nodes.
   Iteration order is pre-order depth-first."""
   if node.nodeType == node.ELEMENT_NODE:
     yield node
   for child_node in node.childNodes:
     for child_node_element in IterateXmlElements(child_node):
       yield child_node_element
 
@@ skipping 50 matching lines @@
     assert_not_deprecated: Whether deprecated attributes (e.g. paddingLeft) will
                            cause an exception to be thrown.
 
   Returns:
     True if dom is modified, False otherwise.
   """
   is_modified = False
 
   # Iterate all the elements' attributes to find attributes to convert.
   for element in IterateXmlElements(dom):
+    attribute_names = [name for name, value in element.attributes.items()]
     for name, value in list(element.attributes.items()):
+      # Some Left&Right attributes safe to use. So we allow those attributes,
+      # while still forcing they are used in a pair as Android recommended.
+      # http://android-developers.blogspot.com/2013/03/
+      #        native-rtl-support-in-android-42.html
+      #
+      # e.g.
+      # android:layout_marginStart="10dp"
+      # android:layout_marginLeft="10dp"
+      if (ALLOWED_ATTRIBUTE_PAIRS.get(name) in attribute_names):
+        continue
+
       # Convert any API 17 Start/End attributes to Left/Right attributes.
       # For example, from paddingStart="10dp" to paddingLeft="10dp"
       # Note: gravity attributes are not necessary to convert because
       # start/end values are backward-compatible. Explained at
       # https://plus.sandbox.google.com/+RomanNurik/posts/huuJd8iVVXY?e=Showroom
       if name in ATTRIBUTES_TO_MAP:
         element.setAttribute(ATTRIBUTES_TO_MAP[name], value)
         del element.attributes[name]
         is_modified = True
       elif assert_not_deprecated:
@@ skipping 202 matching lines @@
   build_utils.MakeDirectory(res_v14_dir)
 
   GenerateV14Resources(options.res_dir, res_v14_dir, options.verify_only)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 if __name__ == '__main__':
   sys.exit(main())