Replace ASSERT with DCHECK in core/

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
    reserved.
 
    This library is free software; you can redistribute it and/or
@@ skipping 116 matching lines @@
   int Width() const { return frame_rect_.Width(); }
   int Height() const { return frame_rect_.Height(); }
   IntSize Size() const { return frame_rect_.Size(); }
   IntPoint Location() const override { return frame_rect_.Location(); }
   void Resize(int width, int height) {
     SetFrameRect(IntRect(frame_rect_.X(), frame_rect_.Y(), width, height));
   }
   void Resize(const IntSize& size) { SetFrameRect(IntRect(Location(), size)); }
 
   LocalFrame& GetFrame() const {
-    ASSERT(frame_);
+    DCHECK(frame_);
     return *frame_;
   }
 
   Page* GetPage() const;
 
   // TODO(pilgrim) replace all instances of layoutView() with layoutViewItem()
   // https://crbug.com/499321
   LayoutView* GetLayoutView() const;
   LayoutViewItem GetLayoutViewItem() const;
 
@@ skipping 1126 matching lines @@
                   frameViewBase.IsFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->IsFrameView(),
                   scrollableArea.IsFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h