Added member data to classes to support download resumption.

content/browser/download/download_file_impl.h

Index: content/browser/download/download_file_impl.h
diff --git a/content/browser/download/download_file_impl.h b/content/browser/download/download_file_impl.h
index 31073c5451139a7eb6ff3a649bf7bb7ed7925e51..5bb38e0a284162451030b56831e807aa6ed7def4 100644
--- a/content/browser/download/download_file_impl.h
+++ b/content/browser/download/download_file_impl.h
@@ -23,7 +23,8 @@ class CONTENT_EXPORT DownloadFileImpl : virtual public DownloadFile {
   // Takes ownership of the object pointed to by |request_handle|.
   DownloadFileImpl(const DownloadCreateInfo* info,
                    DownloadRequestHandleInterface* request_handle,
-                   DownloadManager* download_manager);
+                   DownloadManager* download_manager,
+                   const Pickle& hash_state);
   virtual ~DownloadFileImpl();
 
   // DownloadFile functions.
@@ -39,6 +40,8 @@ class CONTENT_EXPORT DownloadFileImpl : virtual public DownloadFile {
   virtual bool InProgress() const OVERRIDE;
   virtual int64 BytesSoFar() const OVERRIDE;
   virtual bool GetSha256Hash(std::string* hash) OVERRIDE;
+  virtual bool GetSha256HashState(Pickle* hash_state) OVERRIDE;
+  virtual bool SetSha256HashState(Pickle* hash_state) OVERRIDE;
   virtual void CancelDownloadRequest() OVERRIDE;
   virtual int Id() const OVERRIDE;
   virtual DownloadManager* GetDownloadManager() OVERRIDE;