Add Mouse hover behavior to Mac Panels when minimized

chrome/browser/ui/panels/panel_titlebar_view_cocoa.mm

 // Copyright (c) 2011 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/ui/panels/panel_titlebar_view_cocoa.h"
 
 #include <Carbon/Carbon.h>  // kVK_Escape
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "chrome/browser/themes/theme_service.h"
 #import "chrome/browser/ui/cocoa/hover_image_button.h"
 #import "chrome/browser/ui/cocoa/nsview_additions.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #import "chrome/browser/ui/cocoa/tracking_area.h"
 #import "chrome/browser/ui/panels/panel_window_controller_cocoa.h"
 #include "grit/theme_resources_standard.h"
 #import "third_party/GTM/AppKit/GTMNSBezierPath+RoundRect.h"
 #include "ui/gfx/mac/nsimage_cache.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 const int kRoundedCornerSize = 3;
 const int kCloseButtonLeftPadding = 8;
 
 // Used to implement TestingAPI
-static NSEvent* MakeMouseEvent(NSEventType type, NSPoint point) {
+static NSEvent* MakeMouseEvent(NSEventType type,
+                               NSPoint point,
+                               int clickCount) {
   return [NSEvent mouseEventWithType:type
                             location:point
                        modifierFlags:0
                            timestamp:0
                         windowNumber:0
                              context:nil
                          eventNumber:0
-                          clickCount:0
+                          clickCount:clickCount
                             pressure:0.0];
 }
 
 @implementation PanelTitlebarViewCocoa
 
 - (id)initWithFrame:(NSRect)frame {
   if ((self = [super initWithFrame:frame])) {
     dragState_ = PANEL_DRAG_SUPPRESSED;
     // Create standard OSX Close Button.
     closeButton_ = [NSWindow standardWindowButton:NSWindowCloseButton
@@ skipping 294 matching lines @@
 // (Private/TestingAPI)
 - (PanelWindowControllerCocoa*)controller {
   return controller_;
 }
 
 - (void)simulateCloseButtonClick {
   [[closeButton_ cell] performClick:closeButton_];
 }
 
 - (void)pressLeftMouseButtonTitlebar {
-  NSEvent* event = MakeMouseEvent(NSLeftMouseDown, NSZeroPoint);
+  NSEvent* event = MakeMouseEvent(NSLeftMouseDown, NSZeroPoint, 0);
   [self mouseDown:event];
 }
 
 - (void)releaseLeftMouseButtonTitlebar {
-  NSEvent* event = MakeMouseEvent(NSLeftMouseUp, NSZeroPoint);
+  NSEvent* event = MakeMouseEvent(NSLeftMouseUp, NSZeroPoint, 1);
   [self mouseUp:event];
 }
 
 - (void)dragTitlebarDeltaX:(double)delta_x
                     deltaY:(double)delta_y {
   if (dragState_ == PANEL_DRAG_CAN_START)
     [self startDrag];
   [self dragWithDeltaX:delta_x];
 }
 
@@ skipping 13 matching lines @@
 }
 
 - (void)checkMouseAndUpdateSettingsButtonVisibility {
   BOOL mouseOverWindow = NSPointInRect([NSEvent mouseLocation],
                                        [[controller_ window] frame]);
   [self updateSettingsButtonVisibility:mouseOverWindow];
 }
 
 @end