[Android] Fix remaining linker errors for components build

net/url_request/url_request_job_manager.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 NET_URL_REQUEST_URL_REQUEST_JOB_MANAGER_H_
 #define NET_URL_REQUEST_URL_REQUEST_JOB_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/synchronization/lock.h"
 #include "base/threading/platform_thread.h"
+#include "net/base/net_export.h"
 #include "net/url_request/url_request.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 namespace net {
 
 // This class is responsible for managing the set of protocol factories and
 // request interceptors that determine how an URLRequestJob gets created to
 // handle an URLRequest.
 //
 // MULTI-THREADING NOTICE:
 //   URLRequest is designed to have all consumers on a single thread, and
 //   so no attempt is made to support ProtocolFactory or Interceptor instances
 //   being registered/unregistered or in any way poked on multiple threads.
 //   However, we do support checking for supported schemes FROM ANY THREAD
 //   (i.e., it is safe to call SupportsScheme on any thread).
 //
-class URLRequestJobManager {
+class NET_EXPORT URLRequestJobManager {

[Ryan Sleevi, 2013/03/27 19:06:21]

Where is this being used?

I'm a little nervous about arbitrarily NET_EXPORTing this, in that it implies an
API for others to use (particularly within Chrome @ large)

[Yaron, 2013/03/27 19:10:17]

To be honest I didn't investigate too closely. Looks like it's from Android
Webview: android_webview/browser/net/aw_url_request_job_factory.cc

  public:
   // Returns the singleton instance.
   static URLRequestJobManager* GetInstance();
 
   // Instantiate an URLRequestJob implementation based on the registered
   // interceptors and protocol factories.  This will always succeed in
   // returning a job unless we are--in the extreme case--out of memory.
   URLRequestJob* CreateJob(URLRequest* request,
                            NetworkDelegate* network_delegate) const;
 
@@ skipping 65 matching lines @@
   mutable base::Lock lock_;
   FactoryMap factories_;
   InterceptorList interceptors_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestJobManager);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_JOB_MANAGER_H_