Implement classes used for manipulating D-Bus messages.

Message/MethodCall/Response classes wrap around DBusMessage.

MessageReader and Message Writer provide API to read and write
D-Bus messages in a type safe fashion.

BUG=90036
TEST=The code is not yet used in Chrome. Run unit tests.


Review URL: http://codereview.chromium.org/7492029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@94845 0039d316-1c4b-4281-b951-d872f2087c98

build/all.gyp

@@ -79,6 +79,7 @@
           'dependencies': [
             '../breakpad/breakpad.gyp:*',
             '../courgette/courgette.gyp:*',
+            '../dbus/dbus.gyp:*',
             '../sandbox/sandbox.gyp:*',
             '../cloud_print/virtual_driver/virtual_driver_linux.gyp:*',
           ],

dbus/dbus.gyp

@@ -15,6 +15,25 @@
         '../build/linux/system.gyp:dbus',
       ],
       'sources': [
+        'message.cc',
+        'message.h',
+      ],
+    },
+    {
+      'target_name': 'dbus_unittests',
+      'type': 'executable',
+      'dependencies': [
+        'dbus',
+        '../base/base.gyp:test_support_base',
+        '../testing/gtest.gyp:gtest',
+        '../build/linux/system.gyp:dbus',
+      ],
+      'sources': [
+        '../base/test/run_all_unittests.cc',
+        'message_unittest.cc',
+      ],
+      'include_dirs': [
+        '..',
       ],
     },
   ],