content: Split web_drag_dest_gtk.cc into chrome/ and content/ parts.

chrome/browser/tab_contents/web_drag_dest_gtk.h

Index: chrome/browser/tab_contents/web_drag_dest_gtk.h
diff --git a/chrome/browser/tab_contents/web_drag_dest_gtk.h b/chrome/browser/tab_contents/web_drag_dest_gtk.h
index 84511971e78645ada1d02c6780f080c419d2ab57..702981532a4c10a9dc8f9971b1b23ed086e7ced2 100644
--- a/chrome/browser/tab_contents/web_drag_dest_gtk.h
+++ b/chrome/browser/tab_contents/web_drag_dest_gtk.h
@@ -11,13 +11,36 @@
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/task.h"
-#include "chrome/browser/bookmarks/bookmark_node_data.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "webkit/glue/webdropdata.h"
 
 class TabContents;
-class TabContentsWrapper;
+
+// An optional delegate that listens for drags of bookmark data.
+class WebDragBookmarkDelegate {

[jam, 2011/10/11 01:42:21]

nit: this should be in its own file since current convention is to put each
class/enum etc in a separate file.

+ public:
+  // Announces that a drag has started. It's valid that a drag starts, along
+  // with over/enter/leave/drop notifications without receiving any bookmark
+  // data.
+  virtual void DragInitialize(TabContents* contents) = 0;
+
+  // Called when WebDragDestkGtk detects that there's bookmark data in a
+  // drag. Not every drag will trigger these.
+  virtual void OnReceiveDataFromGtk(GtkSelectionData* data) = 0;
+  virtual void OnReceiveProcessedData(const GURL& url,
+                                      const string16& title) = 0;
+
+  // Notifications of drag progression.
+  virtual void OnDragOver() = 0;
+  virtual void OnDragEnter() = 0;
+  virtual void OnDrop() = 0;
+
+  // This should also clear any state kept about this drag.
+  virtual void OnDragLeave() = 0;
+
+  virtual ~WebDragBookmarkDelegate() {}
+};
 
 // A helper class that handles DnD for drops in the renderer. In GTK parlance,
 // this handles destination-side DnD, but not source-side DnD.
@@ -34,9 +57,10 @@ class WebDragDestGtk {
   // See OnDragLeave().
   void DragLeave();
 
- private:
-  FRIEND_TEST_ALL_PREFIXES(WebDragDestGtkTest, NoTabContentsWrapper);
+  WebDragBookmarkDelegate* delegate() const { return delegate_; }
+  void set_delegate(WebDragBookmarkDelegate* delegate) { delegate_ = delegate; }
 
+ private:
   // Called when a system drag crosses over the render view. As there is no drag
   // enter event, we treat it as an enter event (and not a regular motion event)
   // when |context_| is NULL.
@@ -62,11 +86,6 @@ class WebDragDestGtk {
 
   TabContents* tab_contents_;
 
-  // The TabContentsWrapper for |tab_contents_|.
-  // Weak reference; may be NULL if the contents aren't contained in a wrapper
-  // (e.g. WebUI dialogs).
-  TabContentsWrapper* tab_;
-
   // The render view.
   GtkWidget* widget_;
 
@@ -94,9 +113,8 @@ class WebDragDestGtk {
   // |widget_| is.
   int destroy_handler_;
 
-  // The bookmark data for the current tab. This will be empty if there is not
-  // a native bookmark drag (or we haven't gotten the data from the source yet).
-  BookmarkNodeData bookmark_drag_data_;
+  // A delegate that can receive drag information about drag events.
+  WebDragBookmarkDelegate* delegate_;
 
   ScopedRunnableMethodFactory<WebDragDestGtk> method_factory_;