--- a/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.cpp
+++ b/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.cpp
@@ -48,17 +48,17 @@ private:
 
     ClearKeyDecryptor* mTarget;
     GMPBuffer* mBuffer;
     GMPEncryptedBufferMetadata* mMetadata;
   };
 
   struct DestroyTask : public GMPTask
   {
-    DestroyTask(ClearKeyDecryptor* aTarget) : mTarget(aTarget) { }
+    explicit DestroyTask(ClearKeyDecryptor* aTarget) : mTarget(aTarget) { }
 
     virtual void Run() MOZ_OVERRIDE {
       delete mTarget;
     }
 
     virtual void Destroy() MOZ_OVERRIDE {
       delete this;
     }

--- a/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.h
+++ b/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.h
@@ -14,17 +14,17 @@
 #include "gmp-api/gmp-decryption.h"
 #include "ScopedNSSTypes.h"
 
 class ClearKeyDecryptor;
 
 class ClearKeyDecryptionManager MOZ_FINAL : public GMPDecryptor
 {
 public:
-  ClearKeyDecryptionManager(GMPDecryptorHost* aHost);
+  explicit ClearKeyDecryptionManager(GMPDecryptorHost* aHost);
   ~ClearKeyDecryptionManager();
 
   virtual void Init(GMPDecryptorCallback* aCallback) MOZ_OVERRIDE;
 
   virtual void CreateSession(uint32_t aPromiseId,
                              const char* aInitDataType,
                              uint32_t aInitDataTypeSize,
                              const uint8_t* aInitData,