Added member data to classes to support download resumption.

content/browser/download/download_file_manager.cc

Index: content/browser/download/download_file_manager.cc
diff --git a/content/browser/download/download_file_manager.cc b/content/browser/download/download_file_manager.cc
index e6ecc9f81d49118e9e0b8301cba279c05d6eae05..84a7e1459b20a7a5fb9181283d0fddd31f5fbc3a 100644
--- a/content/browser/download/download_file_manager.cc
+++ b/content/browser/download/download_file_manager.cc
@@ -109,9 +109,13 @@ void DownloadFileManager::UpdateInProgressDownloads() {
     DownloadFile* download_file = i->second;
     DownloadManager* manager = download_file->GetDownloadManager();
     if (manager) {
+      std::string partial_hash;
+      if (!download_file->GetPartialSha256Hash(&partial_hash))
+        partial_hash = "";
       BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
           NewRunnableMethod(manager, &DownloadManager::UpdateDownload,
-                            global_id.local(), download_file->bytes_so_far()));
+                            global_id.local(), download_file->bytes_so_far(),
+                            partial_hash));
     }
   }
 }
@@ -164,6 +168,10 @@ void DownloadFileManager::UpdateDownload(
         had_error = true;
 
         int64 bytes_downloaded = download_file->bytes_so_far();
+        std::string partial_hash;
+        if (!download_file->GetPartialSha256Hash(&partial_hash))
+          partial_hash.clear();
+
         // Calling this here in case we get more data, to avoid
         // processing data after an error.  That could lead to
         // files that are corrupted if the later processing succeeded.
@@ -179,6 +187,7 @@ void DownloadFileManager::UpdateDownload(
                   &DownloadManager::OnDownloadInterrupted,
                   global_id.local(),
                   bytes_downloaded,
+                  partial_hash,
                   ConvertNetErrorToInterruptReason(
                       write_result,
                       DOWNLOAD_INTERRUPT_FROM_DISK)));
@@ -209,11 +218,11 @@ void DownloadFileManager::OnResponseCompleted(
     return;
   }
 
-  std::string hash;
-  if (!download_file->GetSha256Hash(&hash))
-    hash.clear();
-
   if (reason == DOWNLOAD_INTERRUPT_REASON_NONE) {
+    std::string hash;
+    if (!download_file->GetSha256Hash(&hash))
+      hash.clear();
+
     BrowserThread::PostTask(
         BrowserThread::UI,
         FROM_HERE,
@@ -224,6 +233,10 @@ void DownloadFileManager::OnResponseCompleted(
             download_file->bytes_so_far(),
             hash));
   } else {
+    std::string partial_hash;
+    if (!download_file->GetPartialSha256Hash(&partial_hash))
+      partial_hash.clear();
+
     BrowserThread::PostTask(
         BrowserThread::UI,
         FROM_HERE,
@@ -232,6 +245,7 @@ void DownloadFileManager::OnResponseCompleted(
             &DownloadManager::OnDownloadInterrupted,
             global_id.local(),
             download_file->bytes_so_far(),
+            partial_hash,
             reason));
   }
   // We need to keep the download around until the UI thread has finalized
@@ -407,12 +421,17 @@ void DownloadFileManager::CancelDownloadOnRename(
     return;
   }
 
+  std::string partial_hash;
+  if (!download_file->GetPartialSha256Hash(&partial_hash))
+    partial_hash.clear();
+
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       NewRunnableMethod(download_manager,
                         &DownloadManager::OnDownloadInterrupted,
                         global_id.local(),
                         download_file->bytes_so_far(),
+                        partial_hash,
                         ConvertNetErrorToInterruptReason(
                             rename_error,
                             DOWNLOAD_INTERRUPT_FROM_DISK)));