Make canvas perf tests run less than 6 sec.

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

Index: PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
diff --git a/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html b/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
index 523e943a02c5aadf1e4582aedfeb87d99fc61eb5..a7688a93bb7e20468aa8d5a2911b82fe043c9581 100644
--- a/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
+++ b/PerformanceTests/Canvas/draw-static-webgl-to-hw-accelerated-canvas-2d.html
@@ -9,9 +9,9 @@ var canvas3D = document.createElement('canvas');
 var gl = canvas3D.getContext('experimental-webgl');
 if (!gl)
     PerfTestRunner.log("\nWebGL is not supported or enabled on this platform!\n");
-var MEASURE_DRAW_TIMES = 1000;
-var MAX_COUNT = 60000;
-var count = 0;
+var MEASURE_DRAW_TIMES = 50;
+var MAX_MEASURE_DRAW_TIMES = 1000;
+var MAX_MEASURE_TIME_PER_FRAME = 1000; // 1 sec
 
 function setSize(canvas2DWidth, canvas2DHeight, webglWidth, webglHeight) {
     canvas2D.width = canvas2DWidth;
@@ -36,25 +36,27 @@ function renderWebGL(gl) {
 function drawWebGLToCanvas2D() {
     if (gl) {
         var start = PerfTestRunner.now();
-        for (var i = 0; i < MEASURE_DRAW_TIMES; i++) {
-            // draw static WebGL
-            ctx2D.drawImage(canvas3D, 0, 0);
+        var count = 0;
+        while ((PerfTestRunner.now() - start <= MAX_MEASURE_TIME_PER_FRAME) && (count * MEASURE_DRAW_TIMES < MAX_MEASURE_DRAW_TIMES)) {
+            for (var i = 0; i < MEASURE_DRAW_TIMES; i++) {
+                // draw static WebGL
+                ctx2D.drawImage(canvas3D, 0, 0);
+            }
+            count++;
         }
         // Calling getImageData() is just to flush out the content when
         // accelerated 2D canvas is in use. The cost of reading 1x1 pixels is low.
         ctx2D.getImageData(0, 0, 1, 1);
-        count++;
 
         var elapsedTime = PerfTestRunner.now() - start;
-        PerfTestRunner.measureValueAsync(MEASURE_DRAW_TIMES * 1000 / elapsedTime);
+        PerfTestRunner.measureValueAsync(MEASURE_DRAW_TIMES * count * 1000 / elapsedTime);
     } else
         PerfTestRunner.measureValueAsync(0);
-    if (count < MAX_COUNT)
-        requestAnimationFrame(drawWebGLToCanvas2D);
+
+    requestAnimationFrame(drawWebGLToCanvas2D);
 }
 
 function onCompletedRun() {
-    count = MAX_COUNT;
 }
 
 window.onload = function () {