Reduced the lifetime of DownloadCreateInfo.

chrome/browser/download/download_manager.h

Index: chrome/browser/download/download_manager.h
diff --git a/chrome/browser/download/download_manager.h b/chrome/browser/download/download_manager.h
index 5cc4e0e3d033b420e6b36fed00e469bceb03d615..ab7f702f7f034cd0bac2a4c96201dd35f66bf1eb 100644
--- a/chrome/browser/download/download_manager.h
+++ b/chrome/browser/download/download_manager.h
@@ -41,6 +41,7 @@
 #include "base/observer_list.h"
 #include "base/scoped_ptr.h"
 #include "base/time.h"
+#include "chrome/browser/download/download_item.h"
 #include "chrome/browser/download/download_status_updater_delegate.h"
 #include "chrome/browser/download/download_process_handle.h"
 #include "chrome/browser/ui/shell_dialogs.h"
@@ -48,7 +49,6 @@
 
 class DownloadFileManager;
 class DownloadHistory;
-class DownloadItem;
 class DownloadPrefs;
 class DownloadStatusUpdater;
 class GURL;
@@ -56,6 +56,7 @@ class Profile;
 class ResourceDispatcherHost;
 class TabContents;
 struct DownloadCreateInfo;
+struct DownloadHistoryInfo;
 struct DownloadSaveInfo;
 
 // Browser's download manager: manages all downloads and destination view.
@@ -114,7 +115,7 @@ class DownloadManager
   bool Init(Profile* profile);
 
   // Notifications sent from the download thread to the UI thread
-  void StartDownload(DownloadCreateInfo* info);
+  void StartDownload(int32 id);
   void UpdateDownload(int32 download_id, int64 size);
   // |hash| is sha256 hash for the downloaded file. It is empty when the hash
   // is not available.
@@ -190,13 +191,11 @@ class DownloadManager
 
   // Methods called on completion of a query sent to the history system.
   void OnQueryDownloadEntriesComplete(
-      std::vector<DownloadCreateInfo>* entries);
-  void OnCreateDownloadEntryComplete(
-      DownloadCreateInfo info, int64 db_handle);
+      std::vector<DownloadHistoryInfo>* entries);
+  void OnCreateDownloadEntryComplete(int32 download_id, int64 db_handle);
 
   // Display a new download in the appropriate browser UI.
-  void ShowDownloadInBrowser(DownloadProcessHandle* process_handle,
-                             DownloadItem* download);
+  void ShowDownloadInBrowser(DownloadItem* download);
 
   // The number of in progress (including paused) downloads.
   int in_progress_count() const {
@@ -232,7 +231,7 @@ class DownloadManager
   void DangerousDownloadValidated(DownloadItem* download);
 
   // Callback function after url is checked with safebrowsing service.
-  void CheckDownloadUrlDone(DownloadCreateInfo* info, bool is_dangerous_url);
+  void CheckDownloadUrlDone(int32 download_id, bool is_dangerous_url);
 
   // Callback function after download file hash is checked with safebrowsing
   // service.
@@ -273,17 +272,20 @@ class DownloadManager
   // Called on the download thread to check whether the suggested file path
   // exists.  We don't check if the file exists on the UI thread to avoid UI
   // stalls from interacting with the file system.
-  void CheckIfSuggestedPathExists(DownloadCreateInfo* info,
+  void CheckIfSuggestedPathExists(int32 download_id,
+                                  DownloadStateInfo state,
                                   const FilePath& default_path);
 
   // Called on the UI thread once the DownloadManager has determined whether the
   // suggested file path exists.
-  void OnPathExistenceAvailable(DownloadCreateInfo* info);
+  void OnPathExistenceAvailable(int32 download_id,
+                                DownloadStateInfo new_state);
 
   // Called back after a target path for the file to be downloaded to has been
   // determined, either automatically based on the suggested file name, or by
   // the user in a Save As dialog box.
-  void AttachDownloadItem(DownloadCreateInfo* info);
+  void ContinueDownloadWithPath(DownloadItem* download,
+                                const FilePath& chosen_file);
 
   // Download cancel helper function.
   // |process_handle| is passed by value because it is ultimately passed to
@@ -313,8 +315,14 @@ class DownloadManager
   // Inform observers that the model has changed.
   void NotifyModelChanged();
 
+  // Get the download item from the history map.  Useful after the item has
+  // been removed from the active map, or was retrieved from the history DB.
   DownloadItem* GetDownloadItem(int id);
 
+  // Get the download item from the active map.  Useful when the item is not
+  // yet in the history map.
+  DownloadItem* GetActiveDownloadItem(int id);
+
   // Debugging routine to confirm relationship between below
   // containers; no-op if NDEBUG.
   void AssertContainersConsistent() const;