Rename context2d to context2D.

tools/dom/templates/html/impl/impl_CanvasRenderingContext2D.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 $!MEMBERS
 
   /**
@@ skipping 44 matching lines @@
    * The image will be drawn to an area of this canvas defined by
    * [destRect]. [sourceRect] defines the region of the source image that is
    * drawn.
    * If [sourceRect] is not provided, then
    * the entire rectangular image from [source] will be drawn to this context.
    *
    * If the image is larger than canvas
    * will allow, the image will be clipped to fit the available space.
    *
    *     CanvasElement canvas = new CanvasElement(width: 600, height: 600);
-   *     CanvasRenderingContext2D ctx = canvas.context2d;
+   *     CanvasRenderingContext2D ctx = canvas.context2D;
    *     ImageElement img = document.query('img');
    *     img.width = 100;
    *     img.height = 100;
    *
    *     // Scale the image to 20x20.
    *     ctx.drawImageToRect(img, new Rect(50, 50, 20, 20));
    *
    *     VideoElement video = document.query('video');
    *     video.width = 100;
    *     video.height = 100;
@@ skipping 57 matching lines @@
 
   /**
    * Draws an image from a CanvasImageSource to this canvas.
    *
    * The entire image from [source] will be drawn to this context with its top
    * left corner at the point ([destX], [destY]). If the image is
    * larger than canvas will allow, the image will be clipped to fit the
    * available space.
    *
    *     CanvasElement canvas = new CanvasElement(width: 600, height: 600);
-   *     CanvasRenderingContext2D ctx = canvas.context2d;
+   *     CanvasRenderingContext2D ctx = canvas.context2D;
    *     ImageElement img = document.query('img');
    *
    *     ctx.drawImage(img, 100, 100);
    *
    *     VideoElement video = document.query('video');
    *     ctx.drawImage(video, 0, 0);
    *
    *     CanvasElement otherCanvas = document.query('canvas');
    *     otherCanvas.width = 100;
    *     otherCanvas.height = 100;
@@ skipping 20 matching lines @@
    * Draws an image from a CanvasImageSource to an area of this canvas.
    *
    * The image will be drawn to this context with its top left corner at the
    * point ([destX], [destY]) and will be scaled to be [destWidth] wide and
    * [destHeight] tall.
    *
    * If the image is larger than canvas
    * will allow, the image will be clipped to fit the available space.
    *
    *     CanvasElement canvas = new CanvasElement(width: 600, height: 600);
-   *     CanvasRenderingContext2D ctx = canvas.context2d;
+   *     CanvasRenderingContext2D ctx = canvas.context2D;
    *     ImageElement img = document.query('img');
    *     img.width = 100;
    *     img.height = 100;
    *
    *     // Scale the image to 300x50 at the point (20, 20)
    *     ctx.drawImageScaled(img, 20, 20, 300, 50);
    *
    * See also:
    *
    *   * [CanvasImageSource] for more information on what data is retrieved
@@ skipping 65 matching lines @@
   @DomName('CanvasRenderingContext2D.lineDashOffset')
   void set lineDashOffset(num value) => JS('void', 
       'typeof #.lineDashOffset != "undefined" ? #.lineDashOffset = # : '
       '#.webkitLineDashOffset = #', this, this, value, this, value);
 $else
   // TODO(amouravski): Add Dartium native methods for drawImage once we figure
   // out how to not break native bindings.
 $endif
 }