Add setBounds method and browsertest for get/set bounds to app window API

chrome/test/data/extensions/platform_apps/windows_api_bounds/main.js

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function closeEnough(actual, expected, maxAllowedDifference) {
+  return Math.abs(actual - expected) <= maxAllowedDifference;
+}
+
+function boundsEqual(b1, b2, slop) {
+  if (!b1 || !b2) {
+    console.error("boundsEqual: got null bounds");
+    window.close();
+    return false;
+  }
+  if (!slop)
+    slop = 0;
+  return (closeEnough(b1.left, b2.left, slop) &&
+          closeEnough(b1.top, b2.top, slop) &&
+          closeEnough(b1.width, b2.width, slop) &&
+          closeEnough(b1.height, b2.height, slop));
+}
+
+function waitForBounds(expectedBounds, callback) {
+  function checkBounds() {
+    var bounds = chrome.app.window.current().getBounds();
+    if (!bounds) {
+      console.error("getBounds returned null!");
+      window.close();
+      return;
+    }
+    if (boundsEqual(bounds, expectedBounds, slop)) {
+      callback();
+    } else {
+      // TODO(asargent) - change this to just listen for the bounds change event
+      // once that's supported.
+      setTimeout(checkBounds, 50);
+    }
+  }
+  checkBounds();
+}
+
+var slop = 0;
+
+chrome.test.sendMessage("ready", function(response) {
+  slop = parseInt(response);
+  waitForBounds({left:100, top:200, width:300, height:400}, function() {
+    var newBounds = {left:50, top:100, width:150, height:200};
+    chrome.app.window.current().setBounds(newBounds);
+    waitForBounds(newBounds, function(){
+      chrome.test.sendMessage("success");
+    });
+  });
+});