Fixes the timeout issue with the pixel tests

chrome/test/data/gpu/pixel_css3d.html

Index: chrome/test/data/gpu/pixel_css3d.html
diff --git a/chrome/test/data/gpu/pixel_css3d.html b/chrome/test/data/gpu/pixel_css3d.html
index ddc7bf5c03d5a280e9216fa9b0b23cb2b91e3066..3fa0fe4212ff0b4bfdb52f5d5dedff15f5dd29b5 100644
--- a/chrome/test/data/gpu/pixel_css3d.html
+++ b/chrome/test/data/gpu/pixel_css3d.html
@@ -25,15 +25,21 @@
 </style>
 <script>
 var g_swapsBeforeAck = 15;
-var g_paintLoopStarted = false;
+var g_targetWidth, g_targetHeight;
+
+function onresized()
+{
+  if (g_targetWidth != window.outerWidth ||
+      g_targetHeight != window.outerHeight)
+    return;
+
+  main();
+}
+
 
 function main()
 {
-  g_swapsBeforeAck = 15;
-  if (!g_paintLoopStarted) {
-    g_paintLoopStarted = true;
-    waitForFinish();
-  }
+  waitForFinish();
 }
 
 function waitForFinish()
@@ -54,9 +60,12 @@ 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);