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

content/plugin/plugin_carbon_interpose_mac.cc

 // 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.
 
 #if !defined(__LP64__)
 
 #include <Carbon/Carbon.h>
 
 #include "content/plugin/plugin_interpose_util_mac.h"
 #include "ui/gfx/rect.h"
@@ skipping 11 matching lines @@
 static CGRect CGRectForWindow(WindowRef window) {
   CGRect bounds = { { 0, 0 }, { 0, 0 } };
   HIWindowGetBounds(window, kWindowContentRgn, kHICoordSpace72DPIGlobal,
                     &bounds);
   return bounds;
 }
 
 struct WindowInfo {
   uint32 window_id;
   CGRect bounds;
-  WindowInfo(WindowRef window) {
+  explicit WindowInfo(WindowRef window) {
     window_id = HIWindowGetCGWindowID(window);
     bounds = CGRectForWindow(window);
   }
 };
 
 static void OnPluginWindowClosed(const WindowInfo& window_info) {
   mac_plugin_interposing::NotifyBrowserOfPluginHideWindow(window_info.window_id,
                                                           window_info.bounds);
 }
 
@@ skipping 76 matching lines @@
   INTERPOSE_FUNCTION(SelectWindow),
   INTERPOSE_FUNCTION(ShowWindow),
   INTERPOSE_FUNCTION(ShowHide),
   INTERPOSE_FUNCTION(DisposeWindow),
   INTERPOSE_FUNCTION(HideWindow),
   INTERPOSE_FUNCTION(ReleaseWindow),
   INTERPOSE_FUNCTION(DisposeDialog),
 };
 
 #endif  // !__LP64__