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

chrome/browser/extensions/api/image_writer_private/test_utils.cc

Index: chrome/browser/extensions/api/image_writer_private/test_utils.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/test_utils.cc b/chrome/browser/extensions/api/image_writer_private/test_utils.cc
index 29c5b5cc3e467aabb2f6152bcc89ca7ef7ad2e80..999898bd9029da0a3c01d01735977336fe93bf97 100644
--- a/chrome/browser/extensions/api/image_writer_private/test_utils.cc
+++ b/chrome/browser/extensions/api/image_writer_private/test_utils.cc
@@ -45,18 +45,16 @@
  private:
   BurnFinishedHandler burn_finished_handler_;
   BurnProgressUpdateHandler burn_progress_update_handler_;
+
 };
 
 } // namespace
 #endif
 
 MockOperationManager::MockOperationManager() : OperationManager(NULL) {}
-MockOperationManager::MockOperationManager(Profile* profile)
-    : OperationManager(profile) {}
 MockOperationManager::~MockOperationManager() {}
 
-ImageWriterUnitTestBase::ImageWriterUnitTestBase()
-    : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {}
+ImageWriterUnitTestBase::ImageWriterUnitTestBase() {}
 ImageWriterUnitTestBase::~ImageWriterUnitTestBase() {}
 
 void ImageWriterUnitTestBase::SetUp() {
@@ -89,6 +87,31 @@
 #endif
 }
 
+bool ImageWriterUnitTestBase::CompareImageAndDevice() {
+  scoped_ptr<char[]> image_buffer(new char[kTestFileSize]);
+  scoped_ptr<char[]> device_buffer(new char[kTestFileSize]);
+
+  while (true) {
+    int image_bytes_read = ReadFile(test_image_path_,
+                                    image_buffer.get(),
+                                    kTestFileSize);
+    int device_bytes_read = ReadFile(test_device_path_,
+                                     device_buffer.get(),
+                                     kTestFileSize);
+
+    if (image_bytes_read != device_bytes_read)
+      return false;
+
+    if (image_bytes_read == 0)
+      return true;
+
+    if (memcmp(image_buffer.get(), device_buffer.get(), image_bytes_read) != 0)
+      return false;
+  }
+
+  return false;
+}
+
 bool ImageWriterUnitTestBase::FillFile(const base::FilePath& file,
                                        const int pattern,
                                        const int length) {