Adds a webstorePrivate method for silently installing extensions.

chrome/browser/extensions/extension_install_ui.cc

 // 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/extensions/extension_install_ui.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 180 matching lines @@
 }
 
 ExtensionInstallUI::ExtensionInstallUI(Profile* profile)
     : profile_(profile),
       ui_loop_(MessageLoop::current()),
       previous_using_native_theme_(false),
       extension_(NULL),
       delegate_(NULL),
       prompt_type_(NUM_PROMPT_TYPES),
       ALLOW_THIS_IN_INITIALIZER_LIST(tracker_(this)),
-      use_app_installed_bubble_(false) {
+      use_app_installed_bubble_(false),
+      skip_post_install_ui_(false) {
   // Remember the current theme in case the user presses undo.
   if (profile_) {
     const Extension* previous_theme =
         ThemeServiceFactory::GetThemeForProfile(profile_);
     if (previous_theme)
       previous_theme_id_ = previous_theme->id();
     previous_using_native_theme_ =
         ThemeServiceFactory::GetForProfile(profile_)->UsingNativeTheme();
   }
 }
@@ skipping 36 matching lines @@
   DCHECK(ui_loop_ == MessageLoop::current());
   extension_ = extension;
   permissions_ = permissions;
   delegate_ = delegate;
 
   ShowConfirmation(PERMISSIONS_PROMPT);
 }
 
 void ExtensionInstallUI::OnInstallSuccess(const Extension* extension,
                                           SkBitmap* icon) {
+  if (skip_post_install_ui_)
+    return;
+
   extension_ = extension;
   SetIcon(icon);
 
   if (extension->is_theme()) {
     ShowThemeInfoBar(previous_theme_id_, previous_using_native_theme_,
                      extension, profile_);
     return;
   }
 
   // Extensions aren't enabled by default in incognito so we confirm
@@ skipping 153 matching lines @@
     bool previous_using_native_theme) {
   Profile* profile = tab_contents->profile();
   return new ThemeInstalledInfoBarDelegate(
       tab_contents->infobar_tab_helper(),
       profile->GetExtensionService(),
       ThemeServiceFactory::GetForProfile(profile),
       new_theme,
       previous_theme_id,
       previous_using_native_theme);
 }