Fix the painting of document markers under zoom and variable DPI

third_party/WebKit/Source/platform/graphics/GraphicsContext.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 252 matching lines @@
                             int from = 0,
                             int to = -1);
 
   void drawLineForText(const FloatPoint&, float width);
   enum DocumentMarkerLineStyle {
     DocumentMarkerSpellingLineStyle,
     DocumentMarkerGrammarLineStyle
   };
   void drawLineForDocumentMarker(const FloatPoint&,
                                  float width,
-                                 DocumentMarkerLineStyle);
+                                 DocumentMarkerLineStyle,
+                                 float zoom);
 
   // beginLayer()/endLayer() behave like save()/restore() for CTM and clip
   // states. Apply SkBlendMode when the layer is composited on the backdrop
   // (i.e. endLayer()).
   void beginLayer(float opacity = 1.0f,
                   SkBlendMode = SkBlendMode::kSrcOver,
                   const FloatRect* = 0,
                   ColorFilter = ColorFilterNone,
                   sk_sp<SkImageFilter> = nullptr);
   void endLayer();
@@ skipping 180 matching lines @@
 
   float m_deviceScaleFactor;
 
   unsigned m_printing : 1;
   unsigned m_hasMetaData : 1;
 };
 
 }  // namespace blink
 
 #endif  // GraphicsContext_h