json_schema_compiler: Use std::vector<char> for binary values.

chrome/browser/chromeos/extensions/wallpaper_function_base.h

 // 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_CHROMEOS_EXTENSIONS_WALLPAPER_FUNCTION_BASE_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_FUNCTION_BASE_H_
 
+#include <string>
+#include <vector>
+
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "components/wallpaper/wallpaper_layout.h"
 #include "extensions/browser/extension_function.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace wallpaper_api_util {
 extern const char kCancelWallpaperMessage[];
 wallpaper::WallpaperLayout GetLayoutEnum(const std::string& layout);
 }  // namespace wallpaper_api_util
 
 // Wallpaper manager function base. It contains a image decoder to decode
 // wallpaper data.
 class WallpaperFunctionBase : public AsyncExtensionFunction {
  public:
   WallpaperFunctionBase();
 
  protected:
   ~WallpaperFunctionBase() override;
 
   // A class to decode JPEG file.
   class UnsafeWallpaperDecoder;
 
   // Holds an instance of WallpaperDecoder.
   static UnsafeWallpaperDecoder* unsafe_wallpaper_decoder_;
 
   // Starts to decode |data|. Must run on UI thread.
-  void StartDecode(const std::string& data);
+  void StartDecode(const std::vector<char>& data);
 
   // Handles cancel case. No error message should be set.
   void OnCancel();
 
   // Handles failure case. Sets error message.
   void OnFailure(const std::string& error);
 
  private:
   virtual void OnWallpaperDecoded(const gfx::ImageSkia& wallpaper) = 0;
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_FUNCTION_BASE_H_