Improve error messaging of webRequest API in case of conflicts

chrome/browser/ui/webui/extensions/extension_settings_handler.h

Index: chrome/browser/ui/webui/extensions/extension_settings_handler.h
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_handler.h b/chrome/browser/ui/webui/extensions/extension_settings_handler.h
index 1f80d25c89fa6aaa57bb9ea6744e39ac553b85a6..97323ff12745af4244197df5a7571f91bafe985b 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_handler.h
+++ b/chrome/browser/ui/webui/extensions/extension_settings_handler.h
@@ -13,7 +13,7 @@
 #include "chrome/browser/api/prefs/pref_change_registrar.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_uninstall_dialog.h"
-#include "chrome/browser/extensions/extension_warning_set.h"
+#include "chrome/browser/extensions/extension_warning_service.h"
 #include "chrome/browser/extensions/requirements_checker.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "content/public/browser/navigation_controller.h"
@@ -62,6 +62,7 @@ class ExtensionSettingsHandler
       public content::WebContentsObserver,
       public ui::SelectFileDialog::Listener,
       public ExtensionUninstallDialog::Delegate,
+      public extensions::ExtensionWarningService::Observer,
       public base::SupportsWeakPtr<ExtensionSettingsHandler>{
  public:
   ExtensionSettingsHandler();
@@ -71,11 +72,11 @@ class ExtensionSettingsHandler
 
   // Extension Detail JSON Struct for page. |pages| is injected for unit
   // testing.
-  // Note: |warning_set| can be NULL in unit tests.
+  // Note: |warning_service| can be NULL in unit tests.
   base::DictionaryValue* CreateExtensionDetailValue(
       const extensions::Extension* extension,
       const std::vector<ExtensionPage>& pages,
-      const ExtensionWarningSet* warning_set);
+      const extensions::ExtensionWarningService* warning_service);
 
   void GetLocalizedValues(base::DictionaryValue* localized_strings);
 
@@ -112,6 +113,9 @@ class ExtensionSettingsHandler
   virtual void ExtensionUninstallAccepted() OVERRIDE;
   virtual void ExtensionUninstallCanceled() OVERRIDE;
 
+  // extensions::ExtensionWarningService::Observer implementation.
+  virtual void ExtensionWarningsChanged() OVERRIDE;
+
   // Helper method that reloads all unpacked extensions.
   void ReloadUnpackedExtensions();