mus/views: Create a mus OSExchangeData::Provider stub, and use it.

ui/views/mus/os_exchange_data_provider_mus.h

Index: ui/views/mus/os_exchange_data_provider_mus.h
diff --git a/ui/views/mus/os_exchange_data_provider_mus.h b/ui/views/mus/os_exchange_data_provider_mus.h
new file mode 100644
index 0000000000000000000000000000000000000000..7d47dd55245b66559954c846884fda53cb5c289d
--- /dev/null
+++ b/ui/views/mus/os_exchange_data_provider_mus.h
@@ -0,0 +1,88 @@
+// Copyright 2016 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 UI_VIEWS_MUS_OS_EXCHANGE_DATA_PROVIDER_MUS_H_
+#define UI_VIEWS_MUS_OS_EXCHANGE_DATA_PROVIDER_MUS_H_
+
+#include "ui/base/dragdrop/os_exchange_data.h"
+
+#include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/image/image_skia.h"
+
+namespace views {
+
+class OSExchangeDataProviderMus : public ui::OSExchangeData::Provider {
+ public:
+  OSExchangeDataProviderMus();
+  ~OSExchangeDataProviderMus() override;
+
+  // Overridden from OSExchangeData::Provider:
+  std::unique_ptr<Provider> Clone() const override;
+
+  void MarkOriginatedFromRenderer() override;
+  bool DidOriginateFromRenderer() const override;
+
+  void SetString(const base::string16& data) override;
+  void SetURL(const GURL& url, const base::string16& title) override;
+  void SetFilename(const base::FilePath& path) override;
+  void SetFilenames(const std::vector<ui::FileInfo>& file_names) override;
+  void SetPickledData(const ui::Clipboard::FormatType& format,
+                              const base::Pickle& data) override;
+
+  bool GetString(base::string16* data) const override;
+  bool GetURLAndTitle(ui::OSExchangeData::FilenameToURLPolicy policy,
+                              GURL* url,
+                              base::string16* title) const override;
+  bool GetFilename(base::FilePath* path) const override;
+  bool GetFilenames(std::vector<ui::FileInfo>* file_names) const override;
+  bool GetPickledData(const ui::Clipboard::FormatType& format,
+                              base::Pickle* data) const override;
+
+  bool HasString() const override;
+  bool HasURL(ui::OSExchangeData::FilenameToURLPolicy policy) const override;
+  bool HasFile() const override;
+  bool HasCustomFormat(const ui::Clipboard::FormatType& format) const override;
+
+  // Provider doesn't have a consistent interface between operating systems;
+  // this wasn't seen as a problem when there was a single Provider subclass
+  // per operating system. Now we have to have at least two providers per OS,
+  // leading to the following warts, which will remain until we clean all the
+  // callsites up.
+#if (!defined(OS_CHROMEOS) && defined(USE_X11)) || defined(OS_WIN)
+  void SetFileContents(const base::FilePath& filename,
+                       const std::string& file_contents) override;
+#endif
+#if defined(OS_WIN)
+  bool GetFileContents(base::FilePath* filename,
+                       std::string* file_contents) const override;
+  bool HasFileContents() const override;
+  void SetDownloadFileInfo(
+      const ui::OSExchangeData::DownloadFileInfo& download) override;
+#endif
+
+#if defined(USE_AURA)
+  void SetHtml(const base::string16& html, const GURL& base_url) override;
+  bool GetHtml(base::string16* html, GURL* base_url) const override;
+  bool HasHtml() const override;
+#endif
+
+#if defined(USE_AURA) || defined(OS_MACOSX)
+  void SetDragImage(const gfx::ImageSkia& image,
+                            const gfx::Vector2d& cursor_offset) override;
+  const gfx::ImageSkia& GetDragImage() const override;
+  const gfx::Vector2d& GetDragImageOffset() const override;
+#endif
+
+ private:
+  // Drag image and offset data.
+  gfx::ImageSkia drag_image_;
+  gfx::Vector2d drag_image_offset_;
+
+
+  DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderMus);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_MUS_OS_EXCHANGE_DATA_PROVIDER_MUS_H_