Update ConstrainedWindowViews appearance according to mock

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 efa96cab66a5f9c88053005992582ec37327b7f2..50a3f4105a928d455eec130686b04b1fa368d0ad 100644
--- a/chrome/browser/ui/browser_window.h
+++ b/chrome/browser/ui/browser_window.h
@@ -344,6 +344,10 @@ class BrowserWindow : public BaseWindow {
   // Construct a FindBar implementation for the |browser|.
   virtual FindBar* CreateFindBar() = 0;
 
+  // Returns the y where the top of the constrained window should be
+  // positioned.
+  virtual int GetConstrainedWindowTopY() = 0;
+
   // Invoked when the preferred size of the contents in current tab has been
   // changed. We might choose to update the window size to accomodate this
   // change.