Update some uses of char16 to use the base:: namespace.

chrome/browser/ui/views/extensions/extension_message_bubble_view.cc

 // Copyright (c) 2013 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/views/extensions/extension_message_bubble_view.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/dev_mode_bubble_controller.h"
@@ skipping 223 matching lines @@
         views::GridLayout::LEADING, views::GridLayout::CENTER,
         0, views::GridLayout::USE_PREF, 0, 0);
 
     layout->StartRowWithPadding(0, extension_list_column_set_id,
         0, kHeadlineMessagePadding);
     views::Label* extensions = new views::Label();
     extensions->SetMultiLine(true);
     extensions->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 
     std::vector<base::string16> extension_list;
-    char16 bullet_point = 0x2022;
+    base::char16 bullet_point = 0x2022;
 
     std::vector<base::string16> suspicious = delegate_->GetExtensions();
     size_t i = 0;
     for (; i < suspicious.size() && i < kMaxExtensionsToShow; ++i) {
       // Add each extension with bullet point.
       extension_list.push_back(
           bullet_point + base::ASCIIToUTF16(" ") + suspicious[i]);
     }
 
     if (i > kMaxExtensionsToShow) {
@@ skipping 65 matching lines @@
   state->role = ui::AccessibilityTypes::ROLE_ALERT;
 }
 
 void ExtensionMessageBubbleView::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
   if (details.is_add && details.child == this)
     NotifyAccessibilityEvent(ui::AccessibilityTypes::EVENT_ALERT, true);
 }
 
 }  // namespace extensions