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

build/android/gyp/generate_v14_compatible_resources.py

Index: build/android/gyp/generate_v14_compatible_resources.py
diff --git a/build/android/gyp/generate_v14_compatible_resources.py b/build/android/gyp/generate_v14_compatible_resources.py
index 2f1d81212eac7130bd32f56561b8dc9764ed337e..ccc69da246aa892f4b37c59a86b40bd2ae01311b 100755
--- a/build/android/gyp/generate_v14_compatible_resources.py
+++ b/build/android/gyp/generate_v14_compatible_resources.py
@@ -54,6 +54,15 @@ ATTRIBUTES_TO_MAP = dict(['android:' + k, 'android:' + v] for k, v
 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.
@@ -124,7 +133,19 @@ def GenerateV14LayoutResourceDom(dom, filename, assert_not_deprecated=True):
 
   # 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