prune down content_dll change to just the CONTENT_EXPORTS

content/app/content_main.h

 // 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.
 
 #ifndef CONTENT_APP_CONTENT_MAIN_H_
 #define CONTENT_APP_CONTENT_MAIN_H_
 #pragma once
 
 #include "build/build_config.h"
+#include "content/common/content_export.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 namespace sandbox {
 struct SandboxInterfaceInfo;
 }
 
 namespace content {
 
 class ContentMainDelegate;
 
 // ContentMain should be called from the embedder's main() function to do the
 // initial setup for every process. The embedder has a chance to customize
 // startup using the ContentMainDelegate interface. The embedder can also pass
 // in NULL for |delegate| if they don't want to override default startup.
 #if defined(OS_WIN)
 
 // |sandbox_info| should be initialized using InitializeSandboxInfo from
 // content_main_win.h
-int ContentMain(HINSTANCE instance,
-                sandbox::SandboxInterfaceInfo* sandbox_info,
-                ContentMainDelegate* delegate);
+CONTENT_EXPORT int ContentMain(HINSTANCE instance,
+                               sandbox::SandboxInterfaceInfo* sandbox_info,
+                               ContentMainDelegate* delegate);
 #else
-int ContentMain(int argc,
-                const char** argv,
-                ContentMainDelegate* delegate);
+CONTENT_EXPORT int ContentMain(int argc,
+                               char** argv,
+                               ContentMainDelegate* delegate);
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_APP_CONTENT_MAIN_H_