Add a couple of linux-specific exports for the content component build.

content/browser/plugin_loader_posix.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_BROWSER_PLUGIN_LOADER_POSIX_H_
 #define CONTENT_BROWSER_PLUGIN_LOADER_POSIX_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 24 matching lines @@
 //    each plugin in the order specified by the list. It sends an IPC message
 //    to the browser after each load, indicating success or failure. The two
 //    processes synchronize the position in the vector that will be used to
 //    attempt to load the next plugin.
 // 4. If the child dies during this process, the host forks another child and
 //    resumes loading at the position past the plugin that it just attempted to
 //    load, bypassing the problematic plugin.
 // 5. This algorithm continues until the canonical list has been walked to the
 //    end, after which the list of loaded plugins is set on the PluginList and
 //    the completion callback is run.
-class PluginLoaderPosix : public UtilityProcessHost::Client,
-                                 IPC::Message::Sender {
+class CONTENT_EXPORT PluginLoaderPosix : public UtilityProcessHost::Client,
+                                                IPC::Message::Sender {
  public:
   PluginLoaderPosix();
 
   // Must be called from the IO thread.
   void LoadPlugins(scoped_refptr<base::MessageLoopProxy> target_loop,
                    const PluginService::GetPluginsCallback& callback);
 
   // UtilityProcessHost::Client:
   virtual void OnProcessCrashed(int exit_code) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
@@ skipping 54 matching lines @@
   std::vector<PendingCallback> callbacks_;
 
   // The time at which plugin loading started.
   base::TimeTicks load_start_time_;
 
   friend class MockPluginLoaderPosix;
   DISALLOW_COPY_AND_ASSIGN(PluginLoaderPosix);
 };
 
 #endif  // CONTENT_BROWSER_PLUGIN_LOADER_POSIX_H_