Fix the build.

Break Android build, clearly it was a typo.

BUG=357163

Review URL: https://codereview.chromium.org/333943002

git-svn-id: svn://svn.chromium.org/blink/trunk@176129 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

@@ -374,7 +374,7 @@ HTMLMediaElement::~HTMLMediaElement()
 
     // The m_audioSourceNode is either dead already or it is dying together with
     // this HTMLMediaElement which it strongly keeps alive.
-#if !ENABLE(OILPAN)
+#if ENABLE(WEB_AUDIO) && !ENABLE(OILPAN)
     ASSERT(!m_audioSourceNode);
 #endif
     clearMediaPlayerAndAudioSourceProviderClientWithoutLocking();