Add more out of line copy ctors for complex classes.

content/public/common/frame_navigate_params.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_FRAME_NAVIGATE_PARAMS_H_
 #define CONTENT_PUBLIC_COMMON_FRAME_NAVIGATE_PARAMS_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "content/common/content_export.h"
 #include "content/public/common/referrer.h"
+#include "ipc/ipc_message_utils.h"
 #include "net/base/host_port_pair.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 namespace content {
 
 // Struct used by WebContentsObserver.
-struct CONTENT_EXPORT FrameNavigateParams {
+// Note that we derived from IPC::NoParams here, because this struct is used in
+// an IPC struct as a parent. Deriving from NoParams allows us to by-pass the
+// out of line constructor checks in our clang plugins.
+struct CONTENT_EXPORT FrameNavigateParams : public IPC::NoParams {
   FrameNavigateParams();
   FrameNavigateParams(const FrameNavigateParams& other);
   ~FrameNavigateParams();
 
   // Page ID of this navigation. The renderer creates a new unique page ID
   // anytime a new session history entry is created. This means you'll get new
   // page IDs for user actions, and the old page IDs will be reloaded when
   // iframes are loaded automatically.
   int32_t page_id;
 
@@ skipping 51 matching lines @@
   // Contents MIME type of main frame.
   std::string contents_mime_type;
 
   // Remote address of the socket which fetched this resource.
   net::HostPortPair socket_address;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_FRAME_NAVIGATE_PARAMS_H_