Split Android-specific dependency from BackgroundLoaderOffliner. Create a subfolder of c/b/offline_…

components/offline_pages/core/background/offliner.h

 // Copyright 2016 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 COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_OFFLINER_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_OFFLINER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 79 matching lines @@
   // number of bytes received from the network (for UI purposes).
   virtual bool LoadAndSave(const SavePageRequest& request,
                            const CompletionCallback& completion_callback,
                            const ProgressCallback& progress_callback) = 0;
 
   // Clears the currently processing request, if any, and skips running its
   // CompletionCallback. Returns false if there is nothing to cancel, otherwise
   // returns true and canceled request will be delivered using callback.
   virtual bool Cancel(const CancelCallback& callback) = 0;
 
+  // On some external condition changes (RAM pressure, browser backgrounded on
+  // low-level devices, etc) it is needed to terminate a load if there is one
+  // in progress. It is no-op if there is no active request loading.
+  virtual void TerminateLoadIfInProgress() = 0;
+
   // Handles timeout scenario. Returns true if lowbar is met and try to do a
   // snapshot of the current webcontents. If that is the case, the result of
   // offlining will be provided by |completion_callback|.
   virtual bool HandleTimeout(int64_t request_id) = 0;
 
   // TODO(dougarnett): add policy support methods.
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_OFFLINER_H_