DO NO SUBMIT: Add CDM_EXPORT to fix tests under ubsan

content_decryption_module.h

Index: content_decryption_module.h
diff --git a/content_decryption_module.h b/content_decryption_module.h
index 28be27b88813893270777d2552c78bfaf976feb1..9046ad2a6d09c4dcac9a85b39b70a569f4cf9371 100644
--- a/content_decryption_module.h
+++ b/content_decryption_module.h
@@ -26,7 +26,7 @@ typedef __int64 int64_t;
 
 #else  // defined(WIN32)
 
-#if defined(CDM_IMPLEMENTATION)
+#if defined(CDM_IMPLEMENTATION) || defined(UNDEFINED_SANITIZER)
 #define CDM_EXPORT __attribute__((visibility("default")))
 #else
 #define CDM_EXPORT
@@ -644,7 +644,7 @@ class ContentDecryptionModule_7 {
 // provided in CreateCdmInstance() to allocate any Buffer that needs to
 // be passed back to the caller. Implementations must call Buffer::Destroy()
 // when a Buffer is created that will never be returned to the caller.
-class ContentDecryptionModule_8 {
+class CDM_EXPORT ContentDecryptionModule_8 {
  public:
   static const int kVersion = 8;
   typedef Host_8 Host;
@@ -829,7 +829,7 @@ class ContentDecryptionModule_8 {
 typedef ContentDecryptionModule_8 ContentDecryptionModule;
 
 // Represents a buffer created by Allocator implementations.
-class Buffer {
+class CDM_EXPORT Buffer {
  public:
   // Destroys the buffer in the same context as it was created.
   virtual void Destroy() = 0;
@@ -985,7 +985,7 @@ class Host_7 {
   virtual ~Host_7() {}
 };
 
-class Host_8 {
+class CDM_EXPORT Host_8 {
  public:
   static const int kVersion = 8;
 
@@ -1123,7 +1123,7 @@ class Host_8 {
 };
 
 // Represents a decrypted block that has not been decoded.
-class DecryptedBlock {
+class CDM_EXPORT DecryptedBlock {
  public:
   virtual void SetDecryptedBuffer(Buffer* buffer) = 0;
   virtual Buffer* DecryptedBuffer() = 0;