Update WebClipboard/WebDropData glue to use new getter/setter for WebDragData.

ui/base/clipboard/clipboard.h

Index: ui/base/clipboard/clipboard.h
diff --git a/ui/base/clipboard/clipboard.h b/ui/base/clipboard/clipboard.h
index 4dc7a380557640a94b1d6cf426d6712104a1987a..6fffd47efe199c5ab9c2206986021ef1e3e7d0d1 100644
--- a/ui/base/clipboard/clipboard.h
+++ b/ui/base/clipboard/clipboard.h
@@ -41,6 +41,13 @@ namespace ui {
 
 class UI_EXPORT Clipboard {
  public:
+  // MIME type constants.
+  static const char kMimeTypeText[];
+  static const char kMimeTypeURIList[];
+  static const char kMimeTypeDownloadURL[];
+  static const char kMimeTypeHTML[];
+  static const char kMimeTypePNG[];
+
   // Platform neutral holder for native data representation of a clipboard type.
   struct UI_EXPORT FormatType {
     FormatType();
@@ -323,11 +330,6 @@ class UI_EXPORT Clipboard {
   GtkClipboard* primary_selection_;
 #endif
 
-  // MIME type constants.
-  static const char kMimeTypeText[];
-  static const char kMimeTypeHTML[];
-  static const char kMimeTypePNG[];
-
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };