Remove LITE from protobuf for serialization to human readable string

TextFormat class methods that output human readable messsages need
Message instance where LITE uses MessageLite.

Change-Id: I4ff14aa9334acdad608f0b02c81d9cb765e70a60

mpd/base/media_info.proto

@@ -3,8 +3,6 @@
 
 syntax = "proto2";
 
-option optimize_for = LITE_RUNTIME;
-
 package dash_packager;
 
 message Range {

mpd/mpd.gyp

@@ -19,6 +19,12 @@
         'proto_out_dir': 'mpd/base',
       },
       'includes': ['../build/protoc.gypi'],
+      'dependencies': [
+        # This target needs to depend on 'protobuf_full_do_not_use' to generate
+        # non-LITE (full) protobuf. We need full protobuf to serialize and
+        # deserialize human readable protobuf messages.
+        '../third_party/protobuf/protobuf.gyp:protobuf_full_do_not_use',
+      ],
     },
     {
       'target_name': 'mpd_builder',