Revert of Significantly cleans up the ImageWriter Operation class and subclasses.

chrome/browser/extensions/api/image_writer_private/operation_manager.h

Index: chrome/browser/extensions/api/image_writer_private/operation_manager.h
diff --git a/chrome/browser/extensions/api/image_writer_private/operation_manager.h b/chrome/browser/extensions/api/image_writer_private/operation_manager.h
index a4ea918685775aef701f4d59dfc45d48d09ef4e3..00489bcea3c853533d3a72159db74886383b3d8b 100644
--- a/chrome/browser/extensions/api/image_writer_private/operation_manager.h
+++ b/chrome/browser/extensions/api/image_writer_private/operation_manager.h
@@ -45,14 +45,16 @@
   // Starts a WriteFromUrl operation.
   void StartWriteFromUrl(const ExtensionId& extension_id,
                          GURL url,
+                         content::RenderViewHost* rvh,
                          const std::string& hash,
-                         const std::string& device_path,
+                         bool saveImageAsDownload,
+                         const std::string& storage_unit_id,
                          const Operation::StartWriteCallback& callback);
 
   // Starts a WriteFromFile operation.
   void StartWriteFromFile(const ExtensionId& extension_id,
                           const base::FilePath& path,
-                          const std::string& device_path,
+                          const std::string& storage_unit_id,
                           const Operation::StartWriteCallback& callback);
 
   // Cancels the extensions current operation if any.
@@ -61,7 +63,7 @@
 
   // Starts a write that removes the partition table.
   void DestroyPartitions(const ExtensionId& extension_id,
-                         const std::string& device_path,
+                         const std::string& storage_unit_id,
                          const Operation::StartWriteCallback& callback);
 
   // Callback for progress events.