[Mac] Refactor the fullscreen code to move logic from BWC into FullscreenCont...

chrome/browser/cocoa/fullscreen_controller.h

Index: chrome/browser/cocoa/fullscreen_controller.h
===================================================================
--- chrome/browser/cocoa/fullscreen_controller.h	(revision 58173)
+++ chrome/browser/cocoa/fullscreen_controller.h	(working copy)
@@ -14,6 +14,8 @@
 
 @class BrowserWindowController;
 @class DropdownAnimation;
+@class FloatingBarBackingView;
+@class FullscreenWindow;
 
 // Provides a controller to manage fullscreen mode for a single browser window.
 // This class handles running animations, showing and hiding the floating
@@ -29,6 +31,13 @@
 // step than it is to manage a constantly-changing tracking area.
 @interface FullscreenController : NSObject<NSAnimationDelegate> {
  @private
+  scoped_nsobject<FullscreenWindow> fullscreenWindow_;
+
+  // Lazily created view which draws the background for the floating set of bars
+  // in fullscreen mode (for window types having a floating bar; it remains nil
+  // for those which don't).
+  scoped_nsobject<NSView> floatingBarBackingView_;
+
   // Our parent controller.
   BrowserWindowController* browserController_;  // weak
 
@@ -39,6 +48,9 @@
   // Whether or not we are in fullscreen mode.
   BOOL isFullscreen_;
 
+  // The proportion of the floating bar which is shown.
+  CGFloat floatingBarShownFraction_;
+
   // The tracking area associated with the floating dropdown bar.  This tracking
   // area is attached to |contentView_|, because when the dropdown is completely
   // hidden, we still need to keep a 1px tall tracking area visible.  Attaching
@@ -88,6 +100,11 @@
                          showDropdown:(BOOL)showDropdown;
 - (void)exitFullscreen;
 
+// Returns the FullscreenWindow associated with this controller.
+- (FullscreenWindow*)window;
+
+- (NSView*)floatingBarBackingView;
+
 // Returns the amount by which the floating bar should be offset downwards (to
 // avoid the menu) and by which the overlay view should be enlarged vertically.
 // Generally, this is > 0 when the fullscreen window is on the primary screen