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

third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.js

Index: third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.js
diff --git a/third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.js b/third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.js
index 983ea657ff12375c6956df66b722d7ffe6283e86..c377a2c2250dc3434419fb2ecd7f1b02165b34ef 100644
--- a/third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.js
+++ b/third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.js
@@ -59,7 +59,6 @@ privateScriptController.installClass("Document", function(DocumentPrototype) {
         for (var i = 0; i < nodeParentPairs.length; i++)
             processNode(nodeParentPairs[i].parentElement, nodeParentPairs[i].node);
 
-        drawArrows();
         initButtons();
 
         return false;
@@ -340,33 +339,6 @@ privateScriptController.installClass("Document", function(DocumentPrototype) {
         return attribute;
     }
 
-    // Tree behaviour.
-
-    function drawArrows()
-    {
-        var ctx = document.getCSSCanvasContext("2d", "arrowRight", 10, 11);
-
-        ctx.fillStyle = "rgb(90,90,90)";
-        ctx.beginPath();
-        ctx.moveTo(0, 0);
-        ctx.lineTo(0, 8);
-        ctx.lineTo(7, 4);
-        ctx.lineTo(0, 0);
-        ctx.fill();
-        ctx.closePath();
-
-        var ctx = document.getCSSCanvasContext("2d", "arrowDown", 10, 10);
-
-        ctx.fillStyle = "rgb(90,90,90)";
-        ctx.beginPath();
-        ctx.moveTo(0, 0);
-        ctx.lineTo(8, 0);
-        ctx.lineTo(4, 7);
-        ctx.lineTo(0, 0);
-        ctx.fill();
-        ctx.closePath();
-    }
-
     function expandFunction(sectionId)
     {
         return function()