Fixes the timeout issue with the pixel tests

chrome/test/data/gpu/pixel_webgl.html

Index: chrome/test/data/gpu/pixel_webgl.html
diff --git a/chrome/test/data/gpu/pixel_webgl.html b/chrome/test/data/gpu/pixel_webgl.html
index 093c1105a4bd35d28250a00873778abe4802ef62..966b087b5500d6e9702cae98378c808758b07346 100644
--- a/chrome/test/data/gpu/pixel_webgl.html
+++ b/chrome/test/data/gpu/pixel_webgl.html
@@ -26,20 +26,29 @@ void main(void)
 
 <script>
 var g_swapsBeforeAck = 15;
-var g_paintLoopStarted = false;
+var g_targetWidth, g_targetHeight;
 var gl;
 
+function onresized()
+{
+  if (window.outerWidth != g_targetWidth ||
+      window.outerHeight != g_targetHeight)
+    return;
+
+  main();
+}
+
 function main()
 {
-  g_swapsBeforeAck = 15;
-
-  if (!g_paintLoopStarted) {
-    g_paintLoopStarted = true;
-    var canvas = document.getElementById("c");
-    gl = initGL(canvas);
-    if (gl && setup(gl))
-      drawSomeFrames();
+  var canvas = document.getElementById("c");
+  gl = initGL(canvas);
+  if (gl && setup(gl)) {
+    drawSomeFrames();
+  } else {
+    domAutomationController.setAutomationId(1);
+    domAutomationController.send("resized");
   }
+
 }
 
 function notifyLoadFinished()
@@ -48,9 +57,11 @@ function notifyLoadFinished()
   domAutomationController.send("ok");
 }
 
-function preCallResizeInChromium()
+function preCallResizeInChromium(targetWidth, targetHeight)
 {
-  window.onresize = main;
+  g_targetWidth = targetWidth;
+  g_targetHeight = targetHeight;
+  window.onresize = onresized;
   // Call main() on a timeout in case the window did not resize for whatever
   // reason.
   setTimeout(main, 10000);