Track the active ExtensionKeybindingRegistry and make it available to EventRewriter.

chrome/browser/ui/views/toolbar/toolbar_view.cc

Index: chrome/browser/ui/views/toolbar/toolbar_view.cc
diff --git a/chrome/browser/ui/views/toolbar/toolbar_view.cc b/chrome/browser/ui/views/toolbar/toolbar_view.cc
index 573795fccd7857eeda603eeecd07b73870235446..2b9d03ea3369877651f30eb598082b8053acc294 100644
--- a/chrome/browser/ui/views/toolbar/toolbar_view.cc
+++ b/chrome/browser/ui/views/toolbar/toolbar_view.cc
@@ -14,6 +14,7 @@
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/command_updater.h"
+#include "chrome/browser/extensions/extension_commands_global_registry.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/theme_service.h"
@@ -270,9 +271,31 @@ void ToolbarView::Init() {
 
 void ToolbarView::OnWidgetVisibilityChanged(views::Widget* widget,
                                             bool visible) {
-  // Safe to call multiple times; the bubble will only appear once.
-  if (visible)
+  if (visible) {
+    // Safe to call multiple times; the bubble will only appear once.
     extension_message_bubble_factory_->MaybeShow(app_menu_);
+  }
+
+  extensions::ExtensionCommandsGlobalRegistry* registry =
+      extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile());
+  if (registry) {
+    if (visible) {

[sky, 2014/09/16 02:34:48]

Isn't it the active state and not the visibility you care about?

[David Tseng, 2014/09/16 04:11:53]

You're right. Added WidgetObserver override.

+      registry->set_registry_for_active_window(
+          browser_actions_->extension_keybinding_registry());
+    } else if (registry->registry_for_active_window() ==
+               browser_actions_->extension_keybinding_registry()) {
+      registry->set_registry_for_active_window(NULL);
+    }
+  }
+}
+
+void ToolbarView::OnWidgetDestroyed(views::Widget* widget) {
+  extensions::ExtensionCommandsGlobalRegistry* registry =
+      extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile());
+  if (registry &&
+      registry->registry_for_active_window() ==
+          browser_actions_->extension_keybinding_registry())
+    registry->set_registry_for_active_window(NULL);
 }
 
 void ToolbarView::Update(WebContents* tab) {