Remove remaining Dart-specific perl code in Dartium

Source/bindings/dart/gyp/dartium.gyp

 {
   'includes': [
     '../../../build/features.gypi',
     '../../../core/core.gypi',
     '../../../modules/modules.gypi',
     'overrides.gypi',
   ],
   'variables': {
     'dart_dir': '../../../../../../dart',
     'dart_lib_dir': '<(dart_dir)/sdk/lib',
     'resources_dir': '../resources',
+    'build_dir': '../../../build',
     'core_dir': '../../../core',
     'modules_dir': '../../../modules',
     'core_gyp_dir': '<(core_dir)',
 
     # Share with Source/core/core.gyp somehow.
     # Note: that SVG exclusions are not applicable for Dartium.
     'bindings_idl_files': [
       '<@(core_idl_files)',
       '<@(core_dependency_idl_files)',
       '<@(modules_idl_files)',
@@ skipping 24 matching lines @@
       'actions': [
         {
           'action_name': 'generateDartDebugHooksSource',
           'inputs': [
             '../DartDebugHooks.js',
           ],
           'outputs': [
             '<(SHARED_INTERMEDIATE_DIR)/blink/DartDebugHooksSource.h',
           ],
           'action': [
-            'perl',
-            'scripts/xxd.pl',
+            'python',
+            '<(build_dir)/scripts/xxd.py',
             'DartDebugHooksSource_js',
             '<@(_inputs)',
             '<@(_outputs)'
           ],
-          'msvs_cygwin_shell': 1,
           'message': 'Generating DartDebugHooksSource.h from DartDebugHooks.js',
         },
       ]
     },
     {
       'target_name': 'dart_generated_sources',
       'type': 'none',
       'toolsets':['host'],
       'hard_dependency': 1,
       'dependencies': [
         '<(core_dir)/core_generated.gyp:make_core_generated#host',
       ],
-      'actions': [
-        {
-          'action_name': 'DartEventHeaders',
-          'inputs': [
-            'scripts/make_header.pl',
-            'scripts/EventNames.in',
-          ],
-          'outputs': [
-            '<(SHARED_INTERMEDIATE_DIR)/blink/DartEventHeaders.h',
-          ],
-          'action': [
-            'perl',
-            '-I', 'scripts',
-            'scripts/make_header.pl',
-            '--input', 'scripts/EventNames.in',
-            '--outputDir', '<(SHARED_INTERMEDIATE_DIR)/blink',
-          ],
-          'msvs_cygwin_shell': 1,
-        },
-        {
-          'action_name': 'DartEventTargetHeaders',
-          'inputs': [
-            'scripts/make_header.pl',
-            '<(core_dir)/events/EventTargetFactory.in',
-          ],
-          'outputs': [
-            '<(SHARED_INTERMEDIATE_DIR)/blink/DartEventTargetHeaders.h',
-          ],
-          'action': [
-            'perl',
-            '-I', 'scripts',
-            'scripts/make_header.pl',
-            '--input', '<(core_dir)/events/EventTargetFactory.in',
-            '--outputDir', '<(SHARED_INTERMEDIATE_DIR)/blink',
-          ],
-          'msvs_cygwin_shell': 1,
-        },
-      ],
     },
     {
       'target_name': 'dart_snapshot',
       'type': 'none',
       'toolsets':['host'],
       'hard_dependency': 1,
       'dependencies': [
         'dart_generated_sources',
         '<(dart_dir)/runtime/dart-runtime.gyp:gen_snapshot#host',
       ],
@@ skipping 34 matching lines @@
           ],
           'action': [
             'python',
             'scripts/generate_dart_bindings.py',
             '<(idls_list_temp_file)',
             'scripts',
             '<(dart_html_lib_dir)/scripts',
             '<(output_path)',
             '<(feature_defines)',
           ],
-          'msvs_cygwin_shell': 1,
         },
         {
           'action_name': 'build_dart_snapshot',
           'variables': {
             'output_path': '<(SHARED_INTERMEDIATE_DIR)/blink/bindings/dart',
             'pure_libs': [
               '<(dart_lib_dir)/html/html_common/html_common.dart',
             ],
           },
           'inputs': [
@@ skipping 17 matching lines @@
           ],
           'action': [
             'python',
             'scripts/build_dart_snapshot.py',
             '<(dart_dir)',
             '<(resources_dir)/DartSnapshot.bytes.template',
             '<(output_path)',
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)gen_snapshot<(EXECUTABLE_SUFFIX)',
             '<@(pure_libs)',
           ],
-          'msvs_cygwin_shell': 1,
         },
       ],
     },
   ],
 }