Preliminary metro snap plumbing.

chrome/browser/ui/browser_window.h

Index: chrome/browser/ui/browser_window.h
diff --git a/chrome/browser/ui/browser_window.h b/chrome/browser/ui/browser_window.h
index 743a3cc5e57bb391eab962709922604a53f92789..9672c650e313ab06f0c47ac9b833b6af2e05609c 100644
--- a/chrome/browser/ui/browser_window.h
+++ b/chrome/browser/ui/browser_window.h
@@ -150,6 +150,14 @@ class BrowserWindow : public BaseWindow {
   // Returns true if the fullscreen bubble is visible.
   virtual bool IsFullscreenBubbleVisible() const = 0;
 
+#if defined(OS_WIN)
+  // Sets state for entering or exiting Win8 Metro snap mode.
+  virtual void SetMetroSnapMode(bool enable) = 0;
+
+  // Returns whether the window is currently in Win8 Metro snap mode.
+  virtual bool IsInMetroSnapMode() const = 0;
+#endif
+
   // Returns the location bar.
   virtual LocationBar* GetLocationBar() const = 0;