Componentization: fix SupplementTracing<0>::~SupplementTracing<0>(void) already defined.

Source/modules/encryptedmedia/MediaKeysController.h

Index: Source/modules/encryptedmedia/MediaKeysController.h
diff --git a/Source/modules/encryptedmedia/MediaKeysController.h b/Source/modules/encryptedmedia/MediaKeysController.h
index e3c7a230525fe8a31341048c8eb9e4f1bfd645eb..9d7514a9810d32c339c5cdbccc6d534878804041 100644
--- a/Source/modules/encryptedmedia/MediaKeysController.h
+++ b/Source/modules/encryptedmedia/MediaKeysController.h
@@ -13,6 +13,7 @@ namespace blink {
 
 class ExecutionContext;
 class MediaKeysClient;
+class Page;

[haraken, 2015/04/22 09:19:43]

Don't we need to include Page.h? (You're including Page.h in classes that derive
HeapSupplement<Page>.)

[tasak, 2015/04/22 10:22:21]

Removed class Page;

 class WebContentDecryptionModule;
 class WebEncryptedMediaClient;