Make h264_parser_unittest compilable under linux.

BUG=
TEST=Compile


Review URL: https://chromiumcodereview.appspot.com/10823063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148975 0039d316-1c4b-4281-b951-d872f2087c98

content/common/gpu/media/h264_parser.h

@@ -222,7 +222,7 @@ struct H264SEIRecoveryPoint {
   int changing_slice_group_idc;
 };
 
-struct H264SEIMessage {
+struct CONTENT_EXPORT H264SEIMessage {
   H264SEIMessage();
 
   enum Type {

content/content_tests.gypi

@@ -727,13 +727,14 @@
           },
         ]
     }],
-    ['chromeos == 1', {
+    ['chromeos == 1 or OS == "linux"', {
       'targets': [
         {
           'target_name': 'h264_parser_unittest',
           'type': 'executable',
           'dependencies': [
             'content_common',
+            '../base/base.gyp:base',
             '../testing/gtest.gyp:gtest',
           ],
           'sources': [