Move ContentDecryptionModule* to platform/

Source/platform/drm/ContentDecryptionModuleSession.h

Index: Source/platform/drm/ContentDecryptionModuleSession.h
diff --git a/Source/core/platform/graphics/ContentDecryptionModuleSession.h b/Source/platform/drm/ContentDecryptionModuleSession.h
similarity index 93%
rename from Source/core/platform/graphics/ContentDecryptionModuleSession.h
rename to Source/platform/drm/ContentDecryptionModuleSession.h
index 30ead6fe8baefd3374c583e4f84459ec89709721..1a7ffe7facd765a9c865085b047cd2082e2fed0e 100644
--- a/Source/core/platform/graphics/ContentDecryptionModuleSession.h
+++ b/Source/platform/drm/ContentDecryptionModuleSession.h
@@ -31,6 +31,7 @@
 #ifndef ContentDecryptionModuleSession_h
 #define ContentDecryptionModuleSession_h
 
+#include "platform/PlatformExport.h"
 #include "public/platform/WebContentDecryptionModuleSession.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
@@ -48,7 +49,7 @@ namespace WebCore {
 
 class KURL;
 
-class ContentDecryptionModuleSessionClient {
+class PLATFORM_EXPORT ContentDecryptionModuleSessionClient {
 public:
     enum MediaKeyErrorCode { UnknownError = 1, ClientError };
     virtual void keyAdded() = 0;
@@ -56,7 +57,7 @@ public:
     virtual void keyMessage(const unsigned char* message, size_t messageLength, const KURL& destinationURL) = 0;
 };
 
-class ContentDecryptionModuleSession : private WebKit::WebContentDecryptionModuleSession::Client {
+class PLATFORM_EXPORT ContentDecryptionModuleSession : BLINK_NON_EXPORTED_BASE(private WebKit::WebContentDecryptionModuleSession::Client) {
 public:
     static PassOwnPtr<ContentDecryptionModuleSession> create(ContentDecryptionModuleSessionClient*);