Remove support for -webkit-canvas and Document.getCSSCanvasContext.

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

Index: third_party/WebKit/Source/core/css/CSSValue.h
diff --git a/third_party/WebKit/Source/core/css/CSSValue.h b/third_party/WebKit/Source/core/css/CSSValue.h
index 74309b09178dd2210ea522c88fdb64677f15fb20..b157f57a09e2f1245243e161f73db1fc93f43df2 100644
--- a/third_party/WebKit/Source/core/css/CSSValue.h
+++ b/third_party/WebKit/Source/core/css/CSSValue.h
@@ -71,7 +71,6 @@ public:
     bool isBasicShapeInsetValue() const { return m_classType == BasicShapeInsetClass; }
 
     bool isBorderImageSliceValue() const { return m_classType == BorderImageSliceClass; }
-    bool isCanvasValue() const { return m_classType == CanvasClass; }
     bool isColorValue() const { return m_classType == ColorClass; }
     bool isCounterValue() const { return m_classType == CounterClass; }
     bool isCursorImageValue() const { return m_classType == CursorImageClass; }
@@ -80,7 +79,7 @@ public:
     bool isFontFaceSrcValue() const { return m_classType == FontFaceSrcClass; }
     bool isFunctionValue() const { return m_classType == FunctionClass; }
     bool isCustomIdentValue() const { return m_classType == CustomIdentClass; }
-    bool isImageGeneratorValue() const { return m_classType >= CanvasClass && m_classType <= RadialGradientClass; }
+    bool isImageGeneratorValue() const { return m_classType >= CrossfadeClass && m_classType <= RadialGradientClass; }
     bool isGradientValue() const { return m_classType >= LinearGradientClass && m_classType <= RadialGradientClass; }
     bool isImageSetValue() const { return m_classType == ImageSetClass; }
     bool isImageValue() const { return m_classType == ImageClass; }
@@ -143,7 +142,6 @@ protected:
         CursorImageClass,
 
         // Image generator classes.
-        CanvasClass,
         CrossfadeClass,
         LinearGradientClass,
         RadialGradientClass,