Create media.dll / libmedia.so for the component build

media/base/filter_factories.h

Index: media/base/filter_factories.h
===================================================================
--- media/base/filter_factories.h	(revision 95116)
+++ media/base/filter_factories.h	(working copy)
@@ -8,6 +8,7 @@
 #include<string>
 
 #include "base/callback_old.h"
+#include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 
 namespace media {
@@ -15,7 +16,7 @@
 class DataSource;
 
 // Asynchronous factory interface for building DataSource objects.
-class DataSourceFactory {
+class MEDIA_EXPORT DataSourceFactory {
  public:
   // Ownership of the DataSource is transferred through this callback.
   typedef Callback2<PipelineStatus, DataSource*>::Type BuildCallback;
@@ -33,7 +34,7 @@
 class Demuxer;
 
 // Asynchronous factory interface for building Demuxer objects.
-class DemuxerFactory {
+class MEDIA_EXPORT DemuxerFactory {
  public:
   // Ownership of the Demuxer is transferred through this callback.
   typedef Callback2<PipelineStatus, Demuxer*>::Type BuildCallback;