Add unit tests for CdmAdapter

media/cdm/ppapi/external_clear_key/clear_key_cdm.cc

Index: media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
diff --git a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
index f6c77815303af428b5a131b4fa5e5915b4234691..61f082035fc8edb8155a73f6190ce2261a6c66db 100644
--- a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
+++ b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
@@ -212,23 +212,15 @@ void ConvertCdmKeysInfo(const std::vector<media::CdmKeyInformation*>& keys_info,
   }
 }
 
-template<typename Type>
-class ScopedResetter {
- public:
-  explicit ScopedResetter(Type* object) : object_(object) {}
-  ~ScopedResetter() { object_->Reset(); }
-
- private:
-  Type* const object_;
-};
-
 void INITIALIZE_CDM_MODULE() {
+  DVLOG(1) << __FUNCTION__;
 #if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
   av_register_all();
 #endif  // CLEAR_KEY_CDM_USE_FFMPEG_DECODER
 }
 
 void DeinitializeCdmModule() {
+  DVLOG(1) << __FUNCTION__;
 }
 
 void* CreateCdmInstance(int cdm_interface_version,
@@ -255,7 +247,8 @@ void* CreateCdmInstance(int cdm_interface_version,
     return NULL;
 
   // TODO(jrummell): Obtain the proper origin for this instance.
-  return new media::ClearKeyCdm(host, key_system_string, GURL::EmptyGURL());
+  GURL empty_gurl;
+  return new media::ClearKeyCdm(host, key_system_string, empty_gurl);
 }
 
 const char* GetCdmVersion() {