Refactor BrowserWindow fullscreen and presentation on Mac to be consistent with other platforms.

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 0bf68d3a549fa7fcea0b46f577cbf2840f4d5f89..59f7dc1f6dbe2ad2e805221cfce21fc2d69daaf8 100644
--- a/chrome/browser/ui/browser_window.h
+++ b/chrome/browser/ui/browser_window.h
@@ -304,13 +304,14 @@ class BrowserWindow : public BaseWindow {
   // Opens the tabpose view.
   virtual void OpenTabpose() = 0;
 
-  // Sets the presentation mode for the window.  If the window is not already in
-  // fullscreen, also enters fullscreen mode.
-  virtual void EnterPresentationMode(
+  // Enters Mac specific fullscreen mode with chrome displayed (e.g. omnibox).
+  // Enter either from non fullscreen, or from fullscreen without chrome.
+  // Exit to normal fullscreen with EnterFullscreen().
+  virtual void EnterFullscreenWithChrome(
       const GURL& url,
       FullscreenExitBubbleType bubble_type) = 0;
-  virtual void ExitPresentationMode() = 0;
-  virtual bool InPresentationMode() = 0;
+  virtual bool IsFullscreenWithChrome() = 0;
+  virtual bool IsFullscreenWithoutChrome() = 0;
 #endif
 
   // Returns the desired bounds for Instant in screen coordinates. Note that if