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

chrome/browser/cocoa/browser_window_controller.mm

Index: chrome/browser/cocoa/browser_window_controller.mm
===================================================================
--- chrome/browser/cocoa/browser_window_controller.mm	(revision 58173)
+++ chrome/browser/cocoa/browser_window_controller.mm	(working copy)
@@ -446,7 +446,7 @@
 
   // TODO(viettrungluu): For some reason, the above doesn't suffice.
   if ([self isFullscreen])
-    [floatingBarBackingView_ setNeedsDisplay:YES];  // Okay even if nil.
+    [[fullscreenController_ floatingBarBackingView] setNeedsDisplay:YES];
 }
 
 - (void)windowDidResignMain:(NSNotification*)notification {
@@ -456,7 +456,7 @@
 
   // TODO(viettrungluu): For some reason, the above doesn't suffice.
   if ([self isFullscreen])
-    [floatingBarBackingView_ setNeedsDisplay:YES];  // Okay even if nil.
+    [[fullscreenController_ floatingBarBackingView] setNeedsDisplay:YES];
 }
 
 // Called when we are activated (when we gain focus).
@@ -1268,11 +1268,6 @@
   [findBarCocoaController_ positionFindBarViewAtMaxY:maxY maxWidth:maxWidth];
 }
 
-- (NSWindow*)createFullscreenWindow {
-  return [[[FullscreenWindow alloc] initForScreen:[[self window] screen]]
-           autorelease];
-}
-
 - (NSInteger)numberOfTabs {
   // count() includes pinned tabs (both live and phantom).
   return browser_->tabstrip_model()->count();
@@ -1716,7 +1711,7 @@
   if (fullscreen) {
     DCHECK(!savedRegularWindow_);
     savedRegularWindow_ = [window retain];
-    destWindow = [self createFullscreenWindow];
+    destWindow = [fullscreenController_ window];
   } else {
     DCHECK(savedRegularWindow_);
     destWindow = [savedRegularWindow_ autorelease];
@@ -1797,12 +1792,7 @@
   [self layoutSubviews];
 }
 
-- (CGFloat)floatingBarShownFraction {
-  return floatingBarShownFraction_;
-}
-
-- (void)setFloatingBarShownFraction:(CGFloat)fraction {
-  floatingBarShownFraction_ = fraction;
+- (void)floatingBarShownFractionChanged {
   [self layoutSubviews];
 }