[Sync] Remove some http-related chrome deps from SyncBackendHostImpl.

chrome/browser/sync/glue/sync_backend_host.h

Index: chrome/browser/sync/glue/sync_backend_host.h
diff --git a/chrome/browser/sync/glue/sync_backend_host.h b/chrome/browser/sync/glue/sync_backend_host.h
index f65ffa1a1de2ddff4ffc4b1bc26b217087b1c60e..f2eee5c7fd0cf4e696f7886d950fe4a63f97be36 100644
--- a/chrome/browser/sync/glue/sync_backend_host.h
+++ b/chrome/browser/sync/glue/sync_backend_host.h
@@ -28,7 +28,8 @@ class MessageLoop;
 }
 
 namespace syncer {
-class NetworkResources;
+class CancelationSignal;
+class HttpPostProviderFactory;
 class SyncManagerFactory;
 class UnrecoverableErrorHandler;
 }
@@ -47,6 +48,8 @@ namespace browser_sync {
 class SyncBackendHost : public sync_driver::BackendDataTypeConfigurer {
  public:
   typedef syncer::SyncStatus Status;
+  typedef base::Callback<scoped_ptr<syncer::HttpPostProviderFactory>(
+      syncer::CancelationSignal*)> HttpPostProviderFactoryGetter;
 
   // Stubs used by implementing classes.
   SyncBackendHost();
@@ -72,7 +75,7 @@ class SyncBackendHost : public sync_driver::BackendDataTypeConfigurer {
       const syncer::WeakHandle<syncer::UnrecoverableErrorHandler>&
           unrecoverable_error_handler,
       const base::Closure& report_unrecoverable_error_function,
-      syncer::NetworkResources* network_resources,
+      const HttpPostProviderFactoryGetter& http_post_provider_factory_getter,
       scoped_ptr<syncer::SyncEncryptionHandler::NigoriState>
           saved_nigori_state) = 0;