clear() is now an alias for drawPaint, so remove its virtual

include/core/SkCanvas.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 603 matching lines @@
     void drawARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b,
                   SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode);
 
     /** Fill the entire canvas' bitmap (restricted to the current clip) with the
         specified color and mode.
         @param color    the color to draw with
         @param mode the mode to apply the color in (defaults to SrcOver)
     */
     void drawColor(SkColor color, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode);
 
-    // TODO: remove virtual when chrome subclass stop overriding this.
-    virtual void clear(SkColor color) {
+    /**
+     *  Helper method for drawing a color in SRC mode, completely replacing all the pixels
+     *  in the current clip with this color.
+     */
+    void clear(SkColor color) {
         this->drawColor(color, SkXfermode::kSrc_Mode);
     }
 
     /**
      * This makes the contents of the canvas undefined. Subsequent calls that
      * require reading the canvas contents will produce undefined results. Examples
      * include blending and readPixels. The actual implementation is backend-
      * dependent and one legal implementation is to do nothing. Like clear(), this
      * ignores the clip.
      *
@@ skipping 900 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif