Support dragging texts into Android WebView.

ui/base/dragdrop/os_exchange_data_provider_android.h

Index: ui/base/dragdrop/os_exchange_data_provider_android.h
diff --git a/ui/base/dragdrop/os_exchange_data_provider_mac.h b/ui/base/dragdrop/os_exchange_data_provider_android.h
similarity index 68%
copy from ui/base/dragdrop/os_exchange_data_provider_mac.h
copy to ui/base/dragdrop/os_exchange_data_provider_android.h
index c619ab9d806b49f6fc93bb436215f221e233efc8..20ee8b769516dad7f6239eb95a41f41f552ba503 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_mac.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_android.h
@@ -1,25 +1,27 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// 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_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_MAC_H_
-#define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_MAC_H_
+#ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_ANDROID_H_
+#define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_ANDROID_H_
 
-#import "base/mac/scoped_nsobject.h"
+#include "base/files/file_path.h"
 #include "base/macros.h"
+#include "base/pickle.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
-
-@class NSPasteboard;
+#include "ui/gfx/geometry/vector2d.h"
+#include "url/gurl.h"
 
 namespace ui {
 
-// OSExchangeData::Provider implementation for Mac.
-class UI_BASE_EXPORT OSExchangeDataProviderMac
+class Clipboard;
+
+// OSExchangeData::Provider implementation for Android.
+class UI_BASE_EXPORT OSExchangeDataProviderAndroid
     : public OSExchangeData::Provider {
  public:
-  OSExchangeDataProviderMac();
-  explicit OSExchangeDataProviderMac(NSPasteboard* pasteboard);
-  ~OSExchangeDataProviderMac() override;
+  OSExchangeDataProviderAndroid();
+  ~OSExchangeDataProviderAndroid() override;
 
   // Overridden from OSExchangeData::Provider:
   Provider* Clone() const override;
@@ -45,11 +47,12 @@ class UI_BASE_EXPORT OSExchangeDataProviderMac
   bool HasCustomFormat(const Clipboard::FormatType& format) const override;
 
  private:
-  base::scoped_nsobject<NSPasteboard> pasteboard_;
+  // String contents.
+  base::string16 string_;
 
-  DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderMac);
+  DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderAndroid);
 };
 
 }  // namespace ui
 
-#endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_MAC_H_
+#endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_ANDROID_H_