Refactor frame generation code so it can be used by multiple modules.

R=pbos@webrtc.org, stefan@webrtc.org, pbos, stefan
BUG=

Review URL: https://webrtc-codereview.appspot.com/2240004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4791 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/common_video/common_video.gyp b/common_video/common_video.gyp
index d8ce1ef..2ba1681 100644
--- a/common_video/common_video.gyp
+++ b/common_video/common_video.gyp
@@ -53,6 +53,17 @@
     ['include_tests==1', {
       'targets': [
         {
+          'target_name': 'frame_generator',
+          'type': 'static_library',
+          'sources': [
+            'test/frame_generator.h',
+            'test/frame_generator.cc',
+          ],
+          'dependencies': [
+            'common_video',
+          ],
+        },
+        {
           'target_name': 'common_video_unittests',
           'type': '<(gtest_target_type)',
           'dependencies': [