[Mac] Location icon in omnibox as drag source.

chrome/browser/cocoa/location_bar_view_mac.h

Index: chrome/browser/cocoa/location_bar_view_mac.h
diff --git a/chrome/browser/cocoa/location_bar_view_mac.h b/chrome/browser/cocoa/location_bar_view_mac.h
index cebab92d5a759b1d0bec589f9c919e6c467129b4..7eee82187694f2084ac58fec4c703dc157d54645 100644
--- a/chrome/browser/cocoa/location_bar_view_mac.h
+++ b/chrome/browser/cocoa/location_bar_view_mac.h
@@ -167,6 +167,12 @@ class LocationBarViewMac : public AutocompleteEditController,
     // Returns the tooltip for this image view or |nil| if there is none.
     virtual const NSString* GetToolTip() { return nil; }
 
+    // Used to determinate if the item can act as a drag source.
+    virtual bool IsDraggable() { return false; }
+
+    // The drag pasteboard to use if a drag is initiated.
+    virtual NSPasteboard* GetDragPasteboard() { return nil; }
+
     // Called on mouse down.
     virtual void OnMousePressed(NSRect bounds) {}
 
@@ -190,6 +196,12 @@ class LocationBarViewMac : public AutocompleteEditController,
     explicit LocationIconView(LocationBarViewMac* owner);
     virtual ~LocationIconView();
 
+    // Is draggable if the autocomplete edit view has not be changed.
+    virtual bool IsDraggable();
+
+    // Drag the URL and title from the current tab.
+    virtual NSPasteboard* GetDragPasteboard();
+
     // Shows the page info dialog.
     virtual void OnMousePressed(NSRect bounds);