Add missing (and remove superfluous) 'explicit' from constructors.

webkit/tools/test_shell/test_webview_delegate_mac.mm

 // Copyright (c) 2012 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 "webkit/tools/test_shell/test_webview_delegate.h"
 
 #import <Cocoa/Cocoa.h>
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCursorInfo.h"
@@ skipping 84 matching lines @@
 
 void TestWebViewDelegate::show(WebNavigationPolicy policy) {
   if (!popup_menu_info_.get())
     return;
   if (this != shell_->popup_delegate())
     return;
   // Display a HTML select menu.
 
   std::vector<WebMenuItem> items;
   for (size_t i = 0; i < popup_menu_info_->items.size(); ++i)
-    items.push_back(popup_menu_info_->items[i]);
+    items.push_back(WebMenuItem(popup_menu_info_->items[i]));
 
   int item_height = popup_menu_info_->itemHeight;
   double font_size = popup_menu_info_->itemFontSize;
   int selected_index = popup_menu_info_->selectedIndex;
   bool right_aligned = popup_menu_info_->rightAligned;
   popup_menu_info_.reset();  // No longer needed.
 
   const WebRect& bounds = popup_bounds_;
 
   // Set up the menu position.
@@ skipping 159 matching lines @@
 void TestWebViewDelegate::SetPageTitle(const string16& title) {
   [[shell_->webViewHost()->view_handle() window]
       setTitle:[NSString stringWithUTF8String:UTF16ToUTF8(title).c_str()]];
 }
 
 void TestWebViewDelegate::SetAddressBarURL(const GURL& url) {
   const char* frameURL = url.spec().c_str();
   NSString *address = [NSString stringWithUTF8String:frameURL];
   [shell_->editWnd() setStringValue:address];
 }