Putting the findbar into a child window.

chrome/browser/cocoa/find_bar_view.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/cocoa/find_bar_view.h"
 
 #import "chrome/browser/cocoa/themed_window.h"
 
 namespace {
 CGFloat kCurveSize = 8;
@@ skipping 47 matching lines @@
   NSPoint phase = [[self window] themePatternPhase];
 
   [context setPatternPhase:phase];
   [super drawBackground];
   [context restoreGraphicsState];
 
   [[self strokeColor] set];
   [path stroke];
 }
 
+- (BOOL)drawsAsKey {
+  return [[[self window] parentWindow] isKeyWindow];
+}
+
 // The findbar is mostly opaque, but has an 8px transparent border on the left
 // and right sides (see |kCurveSize|).  This is an artifact of the way it is
 // drawn.  We override hitTest to return nil for points in this transparent
 // area.
 - (NSView*)hitTest:(NSPoint)point {
   NSView* hitView = [super hitTest:point];
   if (hitView == self) {
     // |rect| is approximately equivalent to the opaque area of the findbar.
     NSRect rect = NSInsetRect([self bounds], kCurveSize, 0);
     if (!NSMouseInRect(point, rect, [self isFlipped]))
@@ skipping 27 matching lines @@
 
 - (void)mouseDragged:(NSEvent *)theEvent {
 }
 
 - (void)rightMouseDragged:(NSEvent *)theEvent {
 }
 
 - (void)otherMouseDragged:(NSEvent *)theEvent {
 }
 @end