Adds imageWriterPrivate support for Windows

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

Index: chrome/browser/extensions/api/image_writer_private/operation.h
diff --git a/chrome/browser/extensions/api/image_writer_private/operation.h b/chrome/browser/extensions/api/image_writer_private/operation.h
index 58c0814617d4bb3100ed8a965fcc395edefdc980..2d9622eb1c5de68eba37d811b2370e6ba7f25086 100644
--- a/chrome/browser/extensions/api/image_writer_private/operation.h
+++ b/chrome/browser/extensions/api/image_writer_private/operation.h
@@ -12,6 +12,7 @@
 #include "base/task/cancelable_task_tracker.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/extensions/api/image_writer_private/image_writer_utils.h"
+#include "chrome/browser/image_writer_client.h"
 #include "chrome/common/extensions/api/image_writer_private.h"
 #include "third_party/zlib/google/zip_reader.h"
 
@@ -116,19 +117,20 @@ class Operation : public base::RefCountedThreadSafe<Operation> {
  private:
   friend class base::RefCountedThreadSafe<Operation>;
 
-  // TODO(haven): Clean up these switches. http://crbug.com/292956
-#if defined(OS_LINUX) && !defined(CHROMEOS)
-  void WriteRun();
-  void WriteChunk(scoped_ptr<image_writer_utils::ImageReader> reader,
-                  scoped_ptr<image_writer_utils::ImageWriter> writer,
-                  int64 bytes_written);
-  bool WriteCleanUp(scoped_ptr<image_writer_utils::ImageReader> reader,
-                    scoped_ptr<image_writer_utils::ImageWriter> writer);
-  void WriteComplete();
-
-  void VerifyWriteStage2(scoped_ptr<std::string> image_hash);
-  void VerifyWriteCompare(scoped_ptr<std::string> image_hash,
-                          scoped_ptr<std::string> device_hash);
+#if !defined(OS_CHROMEOS)
+  // Ensures the client is started.  This may be called many times but will only
+  // instantiate one client which should exist for the lifetime of the
+  // Operation.
+  void StartImageWriterClient();
+
+  // Stops the client.  This must be called to ensure the utility process can
+  // shutdown.
+  void StopImageWriterClient();
+
+  // Reports progress from the client, transforming from bytes to percentage.
+  virtual void WriteImageProgress(int64 total_bytes, int64 curr_bytes);
+
+  scoped_refptr<ImageWriterClient> image_writer_client_;
 #endif
 
 #if defined(OS_CHROMEOS)