Adds imageWriterPrivate support for Windows

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

Index: chrome/browser/extensions/api/image_writer_private/test_utils.h
diff --git a/chrome/browser/extensions/api/image_writer_private/test_utils.h b/chrome/browser/extensions/api/image_writer_private/test_utils.h
index b290e881ee87e86dd7096e3d1bfb981b5d9c5517..9ace59a93e78138a7f6de87be6f5c53437c6285b 100644
--- a/chrome/browser/extensions/api/image_writer_private/test_utils.h
+++ b/chrome/browser/extensions/api/image_writer_private/test_utils.h
@@ -11,6 +11,7 @@
 #include "base/run_loop.h"
 #include "chrome/browser/extensions/api/image_writer_private/operation_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "content/public/test/test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -46,6 +47,24 @@ class MockOperationManager : public OperationManager {
                              const std::string& error_message));
 };
 
+// A specialized MockOperationManager that will call a quit closure when the
+// operation completes or errors.  This is useful because when using other
+// processes the message queue may empty and so we need to wait for a response
+// instead of running until idle.
+class QuittingMockManager : public MockOperationManager {
+ public:
+  explicit QuittingMockManager(const base::Closure& quit_closure);
+
+  virtual void OnComplete(const ExtensionId& extension_id);
+  virtual void OnError(const ExtensionId& extension_id,
+                       image_writer_api::Stage stage,
+                       int progress,
+                       const std::string& error_message);
+
+ private:
+  base::Closure quit_closure_;
+};
+
 // Base class for unit tests that manages creating image and device files.
 class ImageWriterUnitTestBase : public testing::Test {
  public:
@@ -57,9 +76,11 @@ class ImageWriterUnitTestBase : public testing::Test {
 
   virtual void TearDown() OVERRIDE;
 
-  // Compare the image and device files, returning true if they are the same,
-  // false if different.
-  bool CompareImageAndDevice();
+  // Verifies that the data in image_path was written to the file at
+  // device_path.  This is different from base::ContentsEqual because the device
+  // may be larger than the image.
+  bool ImageWrittenToDevice(const base::FilePath& image_path,
+                            const base::FilePath& device_path);
 
   base::ScopedTempDir temp_dir_;
   base::FilePath test_image_path_;
@@ -73,6 +94,7 @@ class ImageWriterUnitTestBase : public testing::Test {
                 const int length);
 
   content::TestBrowserThreadBundle thread_bundle_;
+  content::InProcessUtilityThreadHelper utility_thread_helper_;
 };
 
 }  // namespace image_writer