Validate image files before writing them to media galleries.

chrome/browser/media_galleries/fileapi/supported_image_type_validator.h

Index: chrome/browser/media_galleries/fileapi/supported_image_type_validator.h
diff --git a/chrome/browser/media_galleries/fileapi/supported_image_type_validator.h b/chrome/browser/media_galleries/fileapi/supported_image_type_validator.h
new file mode 100644
index 0000000000000000000000000000000000000000..8c655b5542065b2dd4e27e30a28210d937c8e351
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+++ b/chrome/browser/media_galleries/fileapi/supported_image_type_validator.h
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+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SUPPORTED_IMAGE_TYPE_VALIDATOR_H_
+#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SUPPORTED_IMAGE_TYPE_VALIDATOR_H_
+
+#include "base/basictypes.h"
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "webkit/browser/fileapi/copy_or_move_file_validator.h"
+
+class ImageDecoder;
+
+namespace chrome {
+
+class MediaFileValidatorFactory;
+
+// Use ImageDecoder to determine if the file decodes without error. Handles
+// image files supported by Chrome.
+class SupportedImageTypeValidator : public fileapi::CopyOrMoveFileValidator {
+ public:
+  virtual ~SupportedImageTypeValidator();
+
+  static bool SupportsFileType(const base::FilePath& path);
+
+  virtual void StartValidation(
+      const fileapi::CopyOrMoveFileValidator::ResultCallback&
+          result_callback) OVERRIDE;
+
+ private:
+  friend class MediaFileValidatorFactory;
+
+  explicit SupportedImageTypeValidator(const base::FilePath& file);
+
+  void OnFileOpen(scoped_ptr<std::string> data);
+
+  base::FilePath path_;
+  scoped_refptr<ImageDecoder> decoder_;
+  fileapi::CopyOrMoveFileValidator::ResultCallback callback_;
+  base::WeakPtrFactory<SupportedImageTypeValidator> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(SupportedImageTypeValidator);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SUPPORTED_IMAGE_TYPE_VALIDATOR_H_