Add StreamTextureWrapper/StreamTextureWrapperImpl

content/renderer/media/android/stream_texture_factory.h

Index: content/renderer/media/android/stream_texture_factory.h
diff --git a/content/renderer/media/android/stream_texture_factory.h b/content/renderer/media/android/stream_texture_factory.h
index 0b9d063d59e8d08ed5c26079a1aa4212fdac061a..cf1d874d8337c041680c2dc8595fe7187316703c 100644
--- a/content/renderer/media/android/stream_texture_factory.h
+++ b/content/renderer/media/android/stream_texture_factory.h
@@ -13,6 +13,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "cc/layers/video_frame_provider.h"
+#include "content/common/content_export.h"
 #include "content/renderer/gpu/stream_texture_host_android.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "ui/gfx/geometry/size.h"
@@ -69,7 +70,8 @@ typedef std::unique_ptr<StreamTextureProxy, StreamTextureProxy::Deleter>
     ScopedStreamTextureProxy;
 
 // Factory class for managing stream textures.
-class StreamTextureFactory : public base::RefCounted<StreamTextureFactory> {
+class CONTENT_EXPORT StreamTextureFactory
+    : public base::RefCounted<StreamTextureFactory> {
  public:
   static scoped_refptr<StreamTextureFactory> Create(
       scoped_refptr<ContextProviderCommandBuffer> context_provider);