Tweaks to canvas perf tests to make them stay on the GPU

third_party/WebKit/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html

Index: third_party/WebKit/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
diff --git a/third_party/WebKit/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html b/third_party/WebKit/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
index d3d7bcc20bc323310e491672de021d6521f1e678..ab4849ac93d4e8111e1e696efe16cd8f39328053 100644
--- a/third_party/WebKit/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
+++ b/third_party/WebKit/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
@@ -14,12 +14,11 @@ if (!gl)
 var dummyCanvas2D = document.createElement("canvas");
 var dummyCtx2D = dummyCanvas2D.getContext("2d");
 
-dummyCanvas2D.width = 1;
-dummyCanvas2D.height = 1;
-
 function setSize(canvas2DWidth, canvas2DHeight, webglWidth, webglHeight) {
     canvas2D.width = canvas2DWidth;
     canvas2D.height = canvas2DHeight;
+    dummyCanvas2D.width = canvas2DWidth;
+    dummyCanvas2D.height = canvas2DHeight;
     canvas3D.width = webglWidth;
     canvas3D.height = webglHeight;
 }