Revert "Chromium changes to statically link ffmpeg."

chromecast/media/cma/test/run_all_unittests.cc

Index: chromecast/media/cma/test/run_all_unittests.cc
diff --git a/chromecast/media/cma/test/run_all_unittests.cc b/chromecast/media/cma/test/run_all_unittests.cc
index 133f8bed08b7aa897e037cc33cb43417f2800de4..4820fb0f7d88324cded949277dd8563d834948f5 100644
--- a/chromecast/media/cma/test/run_all_unittests.cc
+++ b/chromecast/media/cma/test/run_all_unittests.cc
@@ -33,7 +33,7 @@ void CmaTestSuite::Initialize() {
 
   // Initialize the FFMpeg library.
   // Note: at this time, AtExitManager is already present.
-  media::InitializeMediaLibrary();
+  media::InitializeMediaLibraryForTesting();
 }
 
 int main(int argc, char** argv) {