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

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

Index: chrome/browser/ui/panels/panel_window_controller_cocoa.mm
diff --git a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
index 167c9058abd1dd3b94900914e6eae57edc0647a7..fce93fef78cfca59c2d9be3fb859975262ad155e 100644
--- a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
+++ b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
@@ -27,6 +27,7 @@
 #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"
 
@@ -412,6 +413,30 @@ static BOOL g_reportAnimationStatus = NO;
   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 {