[GTK] Report isMinimized and correctly restore app windows.

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

Index: chrome/test/data/extensions/platform_apps/windows_api_properties/main.js
diff --git a/chrome/test/data/extensions/platform_apps/windows_api_properties/main.js b/chrome/test/data/extensions/platform_apps/windows_api_properties/main.js
index d4695812b0d260affaf968e72471c2574142e2be..8c5535ccc37588090d28c9c38c51436783c73cdd 100644
--- a/chrome/test/data/extensions/platform_apps/windows_api_properties/main.js
+++ b/chrome/test/data/extensions/platform_apps/windows_api_properties/main.js
@@ -39,11 +39,17 @@ var tests = [
   makeEventTest('onMaximized', function() { current.maximize(); }),
   makeEventTest('onRestored', function() {
     current.minimize();
-    current.restore();
+    current['onMinimized'].addListener(function() {
+      current.restore();
+    });
   }),
   makeEventTest('onRestored', function() {
     current.maximize();
-    current.restore();
+    // Don't call |restore| immediately. On GTK+ platform the restore method
+    // will depend on the previous window state.
+    current['onMaximized'].addListener(function() {
+      current.restore();
+    })
   }),
   makeEventTest('onBoundsChanged', function() {
     current.setBounds({left:5, top:5, width:100, height:100});