canvas: Remove darker composite operator

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 27 matching lines @@
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/CSSPropertyNames.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/parser/CSSParser.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/AXObjectCache.h"
 #include "core/dom/StyleEngine.h"
 #include "core/events/Event.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/frame/Settings.h"
-#include "core/frame/UseCounter.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/ImageData.h"
 #include "core/html/TextMetrics.h"
 #include "core/html/canvas/CanvasFontCache.h"
 #include "core/layout/LayoutBox.h"
 #include "core/layout/LayoutTheme.h"
 #include "modules/canvas2d/CanvasGradient.h"
 #include "modules/canvas2d/CanvasPattern.h"
 #include "modules/canvas2d/CanvasRenderingContext2DState.h"
 #include "modules/canvas2d/CanvasStyle.h"
@@ skipping 564 matching lines @@
 
 String CanvasRenderingContext2D::globalCompositeOperation() const
 {
     return compositeOperatorName(compositeOperatorFromSkia(state().globalComposite()), blendModeFromSkia(state().globalComposite()));
 }
 
 void CanvasRenderingContext2D::setGlobalCompositeOperation(const String& operation)
 {
     CompositeOperator op = CompositeSourceOver;
     WebBlendMode blendMode = WebBlendModeNormal;
-    // TODO(dshwang): Support nonstandard "darker" until M43. crbug.com/425628
-    String operationName = operation;
-    if (operation == "darker") {
-        operationName = "darken";
-        if (canvas())
-            UseCounter::countDeprecation(canvas()->document(), UseCounter::CanvasRenderingContext2DCompositeOperationDarker);
-    }
-    if (!parseCompositeAndBlendOperator(operationName, op, blendMode))
+    if (!parseCompositeAndBlendOperator(operation, op, blendMode))
         return;
     SkXfermode::Mode xfermode = WebCoreCompositeToSkiaComposite(op, blendMode);
     if (state().globalComposite() == xfermode)
         return;
     modifiableState().setGlobalComposite(xfermode);
 }
 
 String CanvasRenderingContext2D::filter() const
 {
     return state().unparsedFilter();
@@ skipping 1686 matching lines @@
         if (imageType == CanvasRenderingContext2DState::NonOpaqueImage)
             return;
         if (alpha < 0xFF)
             return;
     }
 
     canvas()->buffer()->willOverwriteCanvas();
 }
 
 } // namespace blink