media: Make media mojo services a component

media/mojo/services/mojo_cdm_allocator.h

Index: media/mojo/services/mojo_cdm_allocator.h
diff --git a/media/mojo/services/mojo_cdm_allocator.h b/media/mojo/services/mojo_cdm_allocator.h
index c2e354989e5145bdbb291b85670baa230972daad..407fe5de3f2322fe27d1fc4b533ee51306509fee 100644
--- a/media/mojo/services/mojo_cdm_allocator.h
+++ b/media/mojo/services/mojo_cdm_allocator.h
@@ -15,13 +15,14 @@
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "media/cdm/cdm_allocator.h"
+#include "media/mojo/services/media_mojo_export.h"
 #include "mojo/public/cpp/system/buffer.h"
 
 namespace media {
 
 // This is a CdmAllocator that creates buffers using mojo shared memory.
 // The internal logic is similar to ppapi_cdm_buffer.cc.
-class MojoCdmAllocator : public CdmAllocator {
+class MEDIA_MOJO_EXPORT MojoCdmAllocator : public CdmAllocator {

[ddorwin, 2016/05/11 23:02:28]

Why wasn't this necessary before? Do we really want to export it if it wasn't
necessary before?

[xhwang, 2016/05/16 05:41:21]

Previously we use a source_set, where this file will always be statically linked
into the depending target, so there's no need to export anything. Now we are
using a component, which will be a shared library in component builds. We need
XXX_EXPORT for unittest (we have a test for this class).

  public:
   MojoCdmAllocator();
   ~MojoCdmAllocator() final;