GTK: More removal of raw GtkWidget->allocation access.

chrome/browser/automation/testing_automation_provider_gtk.cc

Index: chrome/browser/automation/testing_automation_provider_gtk.cc
diff --git a/chrome/browser/automation/testing_automation_provider_gtk.cc b/chrome/browser/automation/testing_automation_provider_gtk.cc
index f00025f958d00c35f2535c5997eb02a0e2313556..6263a968222b053f220218367105ff65200d6fe4 100644
--- a/chrome/browser/automation/testing_automation_provider_gtk.cc
+++ b/chrome/browser/automation/testing_automation_provider_gtk.cc
@@ -43,7 +43,10 @@ void TestingAutomationProvider::WindowGetViewBounds(int handle,
     if (!widget)
       return;
     *success = true;
-    *bounds = gfx::Rect(widget->allocation.width, widget->allocation.height);
+
+    GtkAllocation allocation;
+    gtk_widget_get_allocation(widget, &allocation);
+    *bounds = gfx::Rect(allocation.width, allocation.height);
     gint x, y;
     if (screen_coordinates) {
       gfx::Point point = gtk_util::GetWidgetScreenPosition(widget);