Implement chrome.downloads.onDeterminingFilename()

chrome/browser/download/chrome_download_manager_delegate.h

Index: chrome/browser/download/chrome_download_manager_delegate.h
diff --git a/chrome/browser/download/chrome_download_manager_delegate.h b/chrome/browser/download/chrome_download_manager_delegate.h
index eb4150d0ee37ba20fb94cba575abe0256124c0a5..a9a081a4d1150d5c2f4c4c73e2a0a9ef9125be0c 100644
--- a/chrome/browser/download/chrome_download_manager_delegate.h
+++ b/chrome/browser/download/chrome_download_manager_delegate.h
@@ -19,7 +19,6 @@
 #include "content/public/browser/notification_registrar.h"
 
 class DownloadPrefs;
-class ExtensionDownloadsEventRouter;
 class PrefRegistrySyncable;
 class Profile;
 
@@ -145,6 +144,8 @@ class ChromeDownloadManagerDelegate
  private:
   friend class base::RefCountedThreadSafe<ChromeDownloadManagerDelegate>;
 
+  struct ContinueFilenameDeterminationInfo;
+
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
@@ -198,6 +199,22 @@ class ChromeDownloadManagerDelegate
       const base::FilePath& reserved_path,
       bool reserved_path_verified);
 
+  // When an extension opts to change a download's target filename, this
+  // sanitizes it before continuing with the filename determination process.
+  void OnExtensionOverridingFilename(
+      const ContinueFilenameDeterminationInfo& continue_info,
+      const base::FilePath& changed_filename,
+      bool overwrite);
+
+  // When extensions either opt not to change a download's target filename, or
+  // the changed filename has been sanitized, this method continues with the
+  // filename determination process, optionally prompting the user to manually
+  // set the filename.
+  void ContinueDeterminingFilename(
+      const ContinueFilenameDeterminationInfo& continue_info,
+      const base::FilePath& suggested_path,
+      bool is_forced_path);
+
   // Called on the UI thread once the final target path is available.
   void OnTargetPathDetermined(
       int32 download_id,
@@ -227,20 +244,6 @@ class ChromeDownloadManagerDelegate
 
   content::NotificationRegistrar registrar_;
 
-  // On Android, GET downloads are not handled by the DownloadManager.
-  // Once we have extensions on android, we probably need the EventRouter
-  // in ContentViewDownloadDelegate which knows about both GET and POST
-  // downloads.
-#if !defined(OS_ANDROID)
-  // The ExtensionDownloadsEventRouter dispatches download creation, change, and
-  // erase events to extensions. Like ChromeDownloadManagerDelegate, it's a
-  // chrome-level concept and its lifetime should match DownloadManager. There
-  // should be a separate EDER for on-record and off-record managers.
-  // There does not appear to be a separate ExtensionSystem for on-record and
-  // off-record profiles, so ExtensionSystem cannot own the EDER.
-  scoped_ptr<ExtensionDownloadsEventRouter> extension_event_router_;
-#endif
-
   // The directory most recently chosen by the user in response to a Save As
   // dialog for a regular download.
   base::FilePath last_download_path_;