Download resumption - Preliminary

content/browser/download/download_manager_impl.h

Index: content/browser/download/download_manager_impl.h
diff --git a/content/browser/download/download_manager_impl.h b/content/browser/download/download_manager_impl.h
index fd148fe0bb6637de48b5cdda8a6640db31ae6d6d..81ffb3c32af99027a0418433ce103840e49006e2 100644
--- a/content/browser/download/download_manager_impl.h
+++ b/content/browser/download/download_manager_impl.h
@@ -19,10 +19,15 @@
 #include "content/browser/download/download_item_impl_delegate.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/download_manager.h"
+#include "content/public/browser/download_url_parameters.h"
 
 class DownloadFileManager;
 class DownloadItemImpl;
 
+namespace content {
+class WebContents;
+}
+
 class CONTENT_EXPORT DownloadManagerImpl
     : public content::DownloadManager,
       private DownloadItemImplDelegate {
@@ -98,6 +103,10 @@ class CONTENT_EXPORT DownloadManagerImpl
 
   virtual ~DownloadManagerImpl();
 
+  virtual void ContinueStartingDownload(
+      int32 id,
+      content::DownloadInterruptReason reason);
+
   // Creates the download item.  Must be called on the UI thread.
   // Returns the |BoundNetLog| used by the |DownloadItem|.
   virtual net::BoundNetLog CreateDownloadItem(DownloadCreateInfo* info);
@@ -124,6 +133,10 @@ class CONTENT_EXPORT DownloadManagerImpl
   // and then notifies this update to the file's observer.
   void OnFileRemovalDetected(int32 download_id);
 
+  // Retrieves the download from the |download_id|.
+  // Returns NULL if the download is not active.
+  content::DownloadItem* GetActiveDownload(int32 download_id);
+
   // Removes |download| from the active and in progress maps.
   // Called when the download is cancelled or has an error.
   // Does nothing if the download is not in the history DB.
@@ -170,7 +183,11 @@ class CONTENT_EXPORT DownloadManagerImpl
   virtual bool ShouldOpenDownload(DownloadItemImpl* item) OVERRIDE;
   virtual bool ShouldOpenFileBasedOnExtension(const FilePath& path) OVERRIDE;
   virtual void CheckForFileRemoval(DownloadItemImpl* download_item) OVERRIDE;
-  virtual void MaybeCompleteDownload(DownloadItemImpl* download) OVERRIDE;
+  virtual void MaybeCompleteDownload(int32 download_id) OVERRIDE;
+  virtual void RestartInterruptedDownload(
+      DownloadItemImpl* download,
+      const content::DownloadUrlParameters::OnStartedCallback& callback)
+          OVERRIDE;
   virtual void DownloadStopped(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadCompleted(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadOpened(DownloadItemImpl* download) OVERRIDE;
@@ -183,6 +200,11 @@ class CONTENT_EXPORT DownloadManagerImpl
   // Factory for creation of downloads items.
   scoped_ptr<content::DownloadItemFactory> factory_;
 
+  // Helper to get |WebContents| from a |DownloadItem|.
+  // Falls back to asking the delegate for one.
+  // May return NULL if it can't.
+  content::WebContents* GetWebContents(const content::DownloadItem* download);
+
   // |downloads_| is the owning set for all downloads known to the
   // DownloadManager.  This includes downloads started by the user in
   // this session, downloads initialized from the history system, and