linux_aura: Compile ash into chrome.

chrome/browser/fullscreen_aurax11.cc

Index: chrome/browser/fullscreen_aurax11.cc
diff --git a/chrome/browser/fullscreen_aurax11.cc b/chrome/browser/fullscreen_aurax11.cc
index b186c006919b73258a66ced6f39fc6d420f71da3..eca8c22bcd84854390bd4be86c5e3e8ba62390a7 100644
--- a/chrome/browser/fullscreen_aurax11.cc
+++ b/chrome/browser/fullscreen_aurax11.cc
@@ -6,11 +6,21 @@
 
 #include <vector>
 
+#include "ash/root_window_controller.h"
+#include "chrome/browser/ui/host_desktop.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 #include "ui/views/widget/widget.h"
 
 bool IsFullScreenMode() {
+#if defined(USE_ASH)
+  if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH) {
+    ash::RootWindowController* controller =
+        ash::RootWindowController::ForTargetRootWindow();
+    return controller && controller->GetWindowForFullscreenMode();
+  }
+#endif
+
   std::vector<aura::Window*> all_windows =
       views::DesktopWindowTreeHostX11::GetAllOpenWindows();
   // Only the topmost window is checked. This works fine in the most cases, but