Add PPB_VarDictionary_Dev support - part 1.

ppapi/ppapi_shared.gypi

Index: ppapi/ppapi_shared.gypi
diff --git a/ppapi/ppapi_shared.gypi b/ppapi/ppapi_shared.gypi
index 2a8f83fda752b015f07cbe351079cb619b4fa1f0..18bea2138d0edf02e56fc0130cf42e37d956635e 100644
--- a/ppapi/ppapi_shared.gypi
+++ b/ppapi/ppapi_shared.gypi
@@ -24,6 +24,8 @@
           'shared_impl/array_writer.h',
           'shared_impl/callback_tracker.cc',
           'shared_impl/callback_tracker.h',
+          'shared_impl/dictionary_var.cc',
+          'shared_impl/dictionary_var.h',
           'shared_impl/file_io_state_manager.cc',
           'shared_impl/file_io_state_manager.h',
           'shared_impl/file_path.cc',
@@ -111,6 +113,8 @@
           'shared_impl/var.h',
           'shared_impl/var_tracker.cc',
           'shared_impl/var_tracker.h',
+          'shared_impl/var_value_conversions.cc',
+          'shared_impl/var_value_conversions.h',
           # TODO(viettrungluu): Split these out; it won't be used in NaCl.
           'shared_impl/private/net_address_private_impl.cc',
           'shared_impl/private/net_address_private_impl.h',
@@ -226,6 +230,7 @@
           'thunk/ppb_url_response_info_api.h',
           'thunk/ppb_url_response_info_thunk.cc',
           'thunk/ppb_url_util_thunk.cc',
+          'thunk/ppb_var_dictionary_thunk.cc',
           'thunk/ppb_video_capture_api.h',
           'thunk/ppb_video_capture_thunk.cc',
           'thunk/ppb_video_decoder_api.h',