Remove global references to first window.

Reviewed by me.

AppKit/CPWindow/CPWindow.j

@@ -336,7 +336,7 @@ CPTexturedBackgroundWindowMask
     
     if (self)
     {
-        _platformWindow = window.firstWindow;
+        [self setPlatformWindow:[CPPlatformWindow primaryPlatformWindow]];
 
         _isFullBridge = NO;
         _registeredDraggedTypes = [CPSet set];

AppKit/Platform/CPPlatform.j

@@ -21,7 +21,7 @@
 #endif
 
     [CPPlatformString bootstrap];
-    window.firstWindow = [[CPPlatformWindow alloc] _init];
+    [CPPlatformWindow setPrimaryPlatformWindow:[[CPPlatformWindow alloc] _init]];
 }
 
 @end

AppKit/Platform/CPPlatformWindow.j

@@ -5,13 +5,33 @@
 #import "../CoreGraphics/CGGeometry.h"
 
 
-var PlatformWindowClass = NULL;
+var PlatformWindowClass = NULL,
+    PrimaryPlatformWindow   = NULL;
 
 @implementation CPPlatformWindow : CPObject
 {
     CGRect  _contentRect;
 }
 
++ (CPPlatformWindow)primaryPlatformWindow
+{
+    return PrimaryPlatformWindow;
+}
+
++ (void)setPrimaryPlatformWindow:(CPPlatformWindow)aPlatformWindow
+{
+    PrimaryPlatformWindow = aPlatformWindow;
+}
+/*
++ (BOOL)supportsMultipleWindows
+{
+#if PLATFORM(BROWSER)
+    return YES;
+#else
+    return NO;
+#endif
+}
+*/
 + (void)_setPlatformWindowClass:(Class)aClass
 {
     PlatformWindowClass = aClass;

AppKit/Platform/DOM/CPDOMWindowBridge.j

@@ -73,12 +73,12 @@ var CPDOMWindowGetFrame,
 
 - (CGRect)visibleFrame
 {
-    return [window.firstWindow usableContentFrame];
+    return [[CPPlatformWindow primaryPlatformWindow] usableContentFrame];
 }
 
 - (CPRect)contentBounds
 {
-    var contentBounds = [window.firstWindow contentRect];
+    var contentBounds = [[CPPlatformWindow primaryPlatformWindow] contentRect];
     contentBounds.origin = CGPointMake(0,0);
 
     return contentBounds;
@@ -86,34 +86,34 @@ var CPDOMWindowGetFrame,
 
 - (CPArray)orderedWindowsAtLevel:(int)aLevel
 {
-    return [window.firstWindow orderedWindowsAtLevel:aLevel];
+    return [[CPPlatformWindow primaryPlatformWindow] orderedWindowsAtLevel:aLevel];
 }
 
 - (CPDOMWindowLayer)layerAtLevel:(int)aLevel create:(BOOL)aFlag
 {
-    return [window.firstWindow layerAtLevel:aLevel create:aFlag];
+    return [[CPPlatformWindow primaryPlatformWindow] layerAtLevel:aLevel create:aFlag];
 }
 
 - (void)order:(CPWindowOrderingMode)aPlace window:(CPWindow)aWindow relativeTo:(CPWindow)otherWindow
 {
-    return [window.firstWindow order:aPlace window:aWindow relativeTo:otherWindow];
+    return [[CPPlatformWindow primaryPlatformWindow] order:aPlace window:aWindow relativeTo:otherWindow];
 }
 
 /* @ignore */
 - (id)_dragHitTest:(CPPoint)aPoint pasteboard:(CPPasteboard)aPasteboard
 {
-    return [window.firstWindow _dragHitTest:aPoint pasteboard:aPasteboard];
+    return [[CPPlatformWindow primaryPlatformWindow] _dragHitTest:aPoint pasteboard:aPasteboard];
 }
 
 /* @ignore */
 - (void)_propagateCurrentDOMEvent:(BOOL)aFlag
 {
-    return [window.firstWindow _propagateCurrentDOMEvent:aFlag];
+    return [[CPPlatformWindow primaryPlatformWindow] _propagateCurrentDOMEvent:aFlag];
 }
 
 - (CPWindow)hitTest:(CPPoint)location
 {
-    return [window.firstWindow hitTest:location];
+    return [[CPPlatformWindow primaryPlatformWindow] hitTest:location];
 }
 
 @end