Introduces window_finder_android.cc

chrome/browser/ui/views/tabs/window_finder.h

Index: chrome/browser/ui/views/tabs/window_finder.h
diff --git a/chrome/browser/ui/views/tabs/window_finder.h b/chrome/browser/ui/views/tabs/window_finder.h
index 91de6c161da5ee8abd0a969dbdc35f4599a248a4..cea930bb6a20eb4bcd2bd488485d83cfee2be652 100644
--- a/chrome/browser/ui/views/tabs/window_finder.h
+++ b/chrome/browser/ui/views/tabs/window_finder.h
@@ -18,9 +18,15 @@ class Point;
 }
 
 // Returns the Window at the specified point, ignoring the windows in |ignore|.
+// TODO(bshe): |root_window| is currently only used on Android platform. Other
+// platforms either do not need |root_window| or can access to ash which could
+// access root window directly by calling ::ash::wm::GetRootWindowAt. Remove
+// |root_window| once we have a way to get root window from |screen_point| on
+// Android. See crbug.com/549735
 gfx::NativeWindow GetLocalProcessWindowAtPoint(
     chrome::HostDesktopType host_desktop_type,
     const gfx::Point& screen_point,
-    const std::set<gfx::NativeWindow>& ignore);
+    const std::set<gfx::NativeWindow>& ignore,
+    gfx::NativeWindow root_window);
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_WINDOW_FINDER_H_