MacViews: Implemented Drag & Drop

ui/base/dragdrop/os_exchange_data_provider_mac.h

Index: ui/base/dragdrop/os_exchange_data_provider_mac.h
diff --git a/ui/base/dragdrop/os_exchange_data_provider_mac.h b/ui/base/dragdrop/os_exchange_data_provider_mac.h
index 378602923a97eeb0f38ccd4c0a2081a6c0a26304..144ddb906ff6b1beb82441366f88cc80e2f13df0 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_mac.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_mac.h
@@ -9,8 +9,13 @@
 #include "base/memory/ref_counted.h"
 #import "ui/base/clipboard/clipboard_util_mac.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
+#include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/image/image_skia.h"
 
 @class NSPasteboard;
+@class NSArray;
+@class NSData;
+@class NSString;
 
 namespace ui {
 class UniquePasteboard;
@@ -44,11 +49,29 @@ class UI_BASE_EXPORT OSExchangeDataProviderMac
   bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const override;
   bool HasFile() const override;
   bool HasCustomFormat(const Clipboard::FormatType& format) const override;
+  void SetDragImage(const gfx::ImageSkia& image,
+                    const gfx::Vector2d& cursor_offset) override;
+  const gfx::ImageSkia& GetDragImage() const override;
+  const gfx::Vector2d& GetDragImageOffset() const override;
+
+  // Returns the data for the specified type in the pasteboard.
+  NSData* GetNSDataForType(NSString* type) const;
+
+  // Creates an OSExchangeData object from the given NSPasteboard object.
+  static std::unique_ptr<OSExchangeData> CreateDataFromPasteboard(
+      NSPasteboard*);
+
+  // Returns an array of pasteboard types that can be supported by
+  // OSExchangeData.
+  static NSArray* SupportedPasteboardTypes();
 
  private:
   explicit OSExchangeDataProviderMac(scoped_refptr<ui::UniquePasteboard>);
   scoped_refptr<ui::UniquePasteboard> pasteboard_;
 
+  gfx::ImageSkia drag_image_;
+  gfx::Vector2d cursor_offset_;
+
   DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderMac);
 };