Notify the WebView when panels gain/lose key window status.

chrome/browser/ui/panels/panel_window_controller_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.
 
 #include "chrome/browser/ui/panels/panel_window_controller_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #import "chrome/browser/ui/cocoa/browser_window_utils.h"
 #import "chrome/browser/ui/cocoa/event_utils.h"
 #import "chrome/browser/ui/cocoa/find_bar/find_bar_bridge.h"
 #import "chrome/browser/ui/cocoa/find_bar/find_bar_cocoa_controller.h"
 #import "chrome/browser/ui/cocoa/menu_controller.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_browser_window_cocoa.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/panel_settings_menu_model.h"
 #import "chrome/browser/ui/panels/panel_titlebar_view_cocoa.h"
 #include "chrome/browser/ui/toolbar/encoding_menu_controller.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/notification_service.h"
 
 const int kMinimumWindowSize = 1;
 const double kBoundsChangeAnimationDuration = 0.25;
 
 // Replicate specific 10.6 SDK declarations for building with prior SDKs.
 #if !defined(MAC_OS_X_VERSION_10_6) || \
     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
 
@@ skipping 365 matching lines @@
     Panel::ExpansionState newExpansionState =
       (panel->expansion_state() != Panel::EXPANDED) ? Panel::EXPANDED
                                                     : Panel::MINIMIZED;
     panel->SetExpansionState(newExpansionState);
 }
 
 - (int)titlebarHeightInScreeenCoordinates {
   NSView* titlebar = [self titlebarView];
   return NSHeight([titlebar convertRect:[titlebar bounds] toView:nil]);
 }
+
+// TODO(dcheng): These two selectors are almost copy-and-paste from
+// BrowserWindowController. Figure out the appropriate way of code sharing,
+// whether it's refactoring more things into BrowserWindowUtils or making a
+// common base controller for browser windows.
+- (void)windowDidBecomeKey:(NSNotification*)notification {
+  if (TabContents* contents =
+          windowShim_->browser()->GetSelectedTabContents()) {
+    if (RenderWidgetHostView* rwhv = contents->GetRenderWidgetHostView())
+      rwhv->SetActive(true);
+  }
+}
+
+- (void)windowDidResignKey:(NSNotification*)notification {
+  if ([NSApp isActive] && ([NSApp keyWindow] == [self window]))

[Dmitry Titov, 2011/09/20 23:36:00]

could you figure out why we do these checks and add a comment? 

+    return;
+
+  if (TabContents* contents =
+          windowShim_->browser()->GetSelectedTabContents()) {
+    if (RenderWidgetHostView* rwhv = contents->GetRenderWidgetHostView())
+      rwhv->SetActive(false);
+  }
+}
+
 // TestingAPI interface implementation
 
 + (void)enableBoundsAnimationNotifications {
   g_reportAnimationStatus = YES;
 }
 
 @end