Pass implementation object to supplemental classes by reference

Source/modules/speech/testing/InternalsSpeechSynthesis.cpp

Index: Source/modules/speech/testing/InternalsSpeechSynthesis.cpp
diff --git a/Source/modules/speech/testing/InternalsSpeechSynthesis.cpp b/Source/modules/speech/testing/InternalsSpeechSynthesis.cpp
index 45385e4772908d4fc0d9383e760ceb67845657b8..eab9dccd4d57d9969f95d89cadf80701b439d23e 100644
--- a/Source/modules/speech/testing/InternalsSpeechSynthesis.cpp
+++ b/Source/modules/speech/testing/InternalsSpeechSynthesis.cpp
@@ -39,11 +39,11 @@
 
 namespace WebCore {
 
-void InternalsSpeechSynthesis::enableMockSpeechSynthesizer(Internals* internals, Document* document)
+void InternalsSpeechSynthesis::enableMockSpeechSynthesizer(Internals&, Document* document)
 {
-    ASSERT(internals && document && document->domWindow());
+    ASSERT(document && document->domWindow());
 
-    SpeechSynthesis* synthesis = DOMWindowSpeechSynthesis::speechSynthesis(document->domWindow());
+    SpeechSynthesis* synthesis = DOMWindowSpeechSynthesis::speechSynthesis(*document->domWindow());
     if (!synthesis)
         return;