Omnibox should accept and navigate URLs dropped using drag and drop.

ui/views/controls/textfield/native_textfield_views.cc

 // Copyright (c) 2012 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.
 
 #include "ui/views/controls/textfield/native_textfield_views.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 175 matching lines @@
   return false;
 }
 
 bool NativeTextfieldViews::GetDropFormats(
     int* formats,
     std::set<OSExchangeData::CustomFormat>* custom_formats) {
   if (!textfield_->enabled() || textfield_->read_only())
     return false;
   // TODO(msw): Can we support URL, FILENAME, etc.?
   *formats = ui::OSExchangeData::STRING;
+  TextfieldController* controller = textfield_->GetController();
+  if (controller)
+    controller->AppendDropFormats(formats, custom_formats);
   return true;
 }
 
 bool NativeTextfieldViews::CanDrop(const OSExchangeData& data) {
-  return textfield_->enabled() && !textfield_->read_only() && data.HasString();
+  int formats;
+  std::set<OSExchangeData::CustomFormat> custom_formats;
+  GetDropFormats(&formats, &custom_formats);
+  return textfield_->enabled() && !textfield_->read_only() &&
+      data.HasAnyFormat(formats, custom_formats);
 }
 
 int NativeTextfieldViews::OnDragUpdated(const ui::DropTargetEvent& event) {
   DCHECK(CanDrop(event.data()));
   bool in_selection = GetRenderText()->IsPointInSelection(event.location());
   is_drop_cursor_visible_ = !in_selection;
   // TODO(msw): Pan over text when the user drags to the visible text edge.
   OnCaretBoundsChanged();
   SchedulePaint();
 
   if (initiating_drag_) {
     if (in_selection)
       return ui::DragDropTypes::DRAG_NONE;
     return event.IsControlDown() ? ui::DragDropTypes::DRAG_COPY :
                                    ui::DragDropTypes::DRAG_MOVE;
   }
   return ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_MOVE;
 }
 
 int NativeTextfieldViews::OnPerformDrop(const ui::DropTargetEvent& event) {
   DCHECK(CanDrop(event.data()));
+
+  TextfieldController* controller = textfield_->GetController();
+  if (controller) {
+      int drag_operation = controller->OnDrop(event.data());
+      if (drag_operation != ui::DragDropTypes::DRAG_NONE)
+        return drag_operation;
+  }
+
   DCHECK(!initiating_drag_ ||
          !GetRenderText()->IsPointInSelection(event.location()));
   OnBeforeUserAction();
   skip_input_method_cancel_composition_ = true;
 
   gfx::SelectionModel drop_destination_model =
       GetRenderText()->FindCursorPosition(event.location());
   string16 text;
   event.data().GetString(&text);
   text = GetTextForDisplay(text);
@@ skipping 1030 matching lines @@
   // Filter out all control characters, including tab and new line characters,
   // and all characters with Alt modifier. But we need to allow characters with
   // AltGr modifier.
   // On Windows AltGr is represented by Alt+Ctrl, and on Linux it's a different
   // flag that we don't care about.
   return ((ch >= 0x20 && ch < 0x7F) || ch > 0x9F) &&
       (flags & ~(ui::EF_SHIFT_DOWN | ui::EF_CAPS_LOCK_DOWN)) != ui::EF_ALT_DOWN;
 }
 
 }  // namespace views