Add sanity check to generateKey to make sure usages aren't empty

content/child/webcrypto/algorithm_dispatch.h

Index: content/child/webcrypto/algorithm_dispatch.h
diff --git a/content/child/webcrypto/algorithm_dispatch.h b/content/child/webcrypto/algorithm_dispatch.h
index 977b792045f9d03c93d3bd81e385cf95ce7f2e84..9bc86124176dc587740d8e3b3e13d9c152e4abdc 100644
--- a/content/child/webcrypto/algorithm_dispatch.h
+++ b/content/child/webcrypto/algorithm_dispatch.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
+#include "content/child/webcrypto/generate_key_result.h"

[eroman, 2014/12/05 19:41:55]

Please move the header to the .cc file and leave this file unchanged.

In Chromium we prefer to use forward declarations to reduce header bloat from
slowing down compiles (headers in C++ are not very efficient)

[nharper, 2014/12/05 23:15:47]

Done.

 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 
@@ -18,7 +19,6 @@ namespace webcrypto {
 
 class AlgorithmImplementation;
 class CryptoData;
-class GenerateKeyResult;
 class Status;
 
 // These functions provide an entry point for synchronous webcrypto operations.