Move implementation of dart:mojo.internal to mojo/public/platform/dart

mojo/PRESUBMIT.py

 # Copyright 2014 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.
 
 """Presubmit script for mojo
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 94 matching lines @@
       m = re.search(r'"(//[^"]*)"', line)
       if not m:
         continue
       referenced_path = m.group(1)
 
       if not referenced_path.startswith("//mojo"):
         # In the EDK, all external absolute paths are allowed.
         if package == "EDK":
           continue
 
+        dart_reference_allowed = (f.LocalPath() == "mojo/public/mojo_sdk.gni" or
+            os.path.dirname(f.LocalPath()) == "mojo/public/platform/dart")
+
+        if referenced_path.startswith("//dart") and dart_reference_allowed:
+          continue
+
         # Determine if this is a whitelisted external path.
         if referenced_path in _PACKAGE_WHITELISTED_EXTERNAL_PATHS[package]:
           continue
 
       illegal_references.append((f.LocalPath(), line_num, referenced_path))
 
   return illegal_references
 
 def _PathReferenceInBuildFileWarningItem(build_file, line_num, referenced_path):
   """Returns a string expressing a warning item that |referenced_path| is
@@ skipping 155 matching lines @@
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   results.extend(_CheckChangePylintsClean(input_api, output_api))
   return results
 
 def CheckChangeOnCommit(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   return results