Removed incorrect comment about raw pointer.

third_party/WebKit/Source/core/css/MediaValuesDynamic.h

Index: third_party/WebKit/Source/core/css/MediaValuesDynamic.h
diff --git a/third_party/WebKit/Source/core/css/MediaValuesDynamic.h b/third_party/WebKit/Source/core/css/MediaValuesDynamic.h
index 7369bc185ee0356221f26691351f42dd545d4e92..089e4342d2674b750f8cd9331a34104358ae5792 100644
--- a/third_party/WebKit/Source/core/css/MediaValuesDynamic.h
+++ b/third_party/WebKit/Source/core/css/MediaValuesDynamic.h
@@ -51,8 +51,6 @@ class MediaValuesDynamic final : public MediaValues {
                      double viewportWidth,
                      double viewportHeight);
 
-  // This raw ptr is safe, as MediaValues would not outlive MediaQueryEvaluator,
-  // and MediaQueryEvaluator is reset on |Document::detachLayoutTree|.
   Member<LocalFrame> m_frame;
   bool m_viewportDimensionsOverridden;
   double m_viewportWidthOverride;