Protect MediaValuesCached creation when RenderView is missing

Source/core/css/MediaValuesCached.cpp

Index: Source/core/css/MediaValuesCached.cpp
diff --git a/Source/core/css/MediaValuesCached.cpp b/Source/core/css/MediaValuesCached.cpp
index 2e2811d2879200df05d2262c1d61df82a4d19a3e..60caa50af3008dcbc1deaafa788260fc6fd613c3 100644
--- a/Source/core/css/MediaValuesCached.cpp
+++ b/Source/core/css/MediaValuesCached.cpp
@@ -7,6 +7,7 @@
 
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/dom/Document.h"
+#include "core/frame/LocalFrame.h"
 #include "core/html/imports/HTMLImportsController.h"
 #include "core/rendering/RenderObject.h"
 
@@ -31,7 +32,9 @@ PassRefPtr<MediaValues> MediaValuesCached::create(Document& document)
 
 PassRefPtr<MediaValues> MediaValuesCached::create(LocalFrame* frame)
 {
-    if (!frame)
+    // FIXME - Added an assert here so we can better understand when a frame is present without its view().
+    ASSERT(!frame || frame->view());
+    if (!frame || !frame->view())
         return adoptRef(new MediaValuesCached());
     return adoptRef(new MediaValuesCached(frame));
 }