Added Dartium changes onto 45.0.2454.104

Source/bindings/core/dart/dart-native-extensions.gyp

+{
+  'variables': {
+    'dart_dir': '../../../../../../dart',
+  },
+
+  'targets': [
+    {
+      'target_name': 'dart_library',
+      'type': 'shared_library',
+      'dependencies': [
+        '<(dart_dir)/runtime/dart-runtime.gyp:libdart',
+      ],
+      'sources': [
+        'shared_lib/DartLibraryMain.cpp',
+      ],
+      'conditions': [
+        ['OS=="linux"', {
+          'cflags': [
+            '-fPIC',
+          ],
+          'ldflags!': [
+            # Remove to allow Dart_ APIs to be exported.
+            '-Wl,--exclude-libs=ALL',
+          ],
+        }],
+        ['OS=="android"', {
+          'cflags': [
+            '-fPIC',
+          ],
+          'link_settings': {
+            'libraries': [
+              '-landroid',
+              '-llog',
+            ],
+          },
+          'ldflags!': [
+            # Remove to allow Dart_ APIs to be exported.
+            '-Wl,--exclude-libs=ALL',
+          ],
+          'ldflags': [
+            '-rdynamic',
+          ],
+          'all_dependent_settings': {
+            'ldflags!': [
+              # See https://code.google.com/p/chromium/issues/detail?id=266155
+              # When compiling dependent shared libraries, Android's GCC linker
+              # reports a warning that this library is referencing isspace from
+              # libjingle.
+              # isspace should be inlined and is not reported as unresolved in
+              # this library.
+              '-Wl,--fatal-warnings',
+            ],
+          },
+        }],
+      ],
+    },
+  ],
+}