Remove parts of //cc we aren't using

cc/resources/texture_mailbox.h

Index: cc/resources/texture_mailbox.h
diff --git a/cc/resources/texture_mailbox.h b/cc/resources/texture_mailbox.h
index cec60cedacaa46b465ac9a54406505e360dca140..1540b9312ae944ceed9ab2ed832688259487bc99 100644
--- a/cc/resources/texture_mailbox.h
+++ b/cc/resources/texture_mailbox.h
@@ -8,7 +8,6 @@
 #include <string>
 
 #include "base/memory/shared_memory.h"
-#include "cc/base/cc_export.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
 #include "ui/gfx/geometry/size.h"
 
@@ -17,7 +16,7 @@ class SharedBitmap;
 
 // TODO(skaslev, danakj) Rename this class more apropriately since now it
 // can hold a shared memory resource as well as a texture mailbox.
-class CC_EXPORT TextureMailbox {
+class TextureMailbox {
  public:
   TextureMailbox();
   explicit TextureMailbox(const gpu::MailboxHolder& mailbox_holder);