GTK: hook up drag and drop of browser actions (for reordering)....

chrome/browser/extensions/extension_toolbar_model.cc

 // Copyright (c) 2009 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 "chrome/browser/extensions/extension_toolbar_model.h"
 
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/notification_service.h"
 
@@ skipping 15 matching lines @@
 }
 
 void ExtensionToolbarModel::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void ExtensionToolbarModel::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
+void ExtensionToolbarModel::MoveBrowserAction(Extension* extension,
+                                              int index) {
+  ExtensionList::iterator pos = std::find(begin(), end(), extension);
+  if (pos == end()) {
+    NOTREACHED();
+    return;
+  }
+  toolitems_.erase(pos);
+
+  int i = 0;
+  bool inserted = false;
+  for (ExtensionList::iterator iter = begin(); iter != end(); ++iter, ++i) {
+    if (i == index) {
+      toolitems_.insert(pos, extension);
+      inserted = true;
+      break;
+    }
+  }
+
+  if (!inserted) {
+    DCHECK_EQ(index, static_cast<int>(toolitems_.size()));
+    index = toolitems_.size();
+
+    toolitems_.push_back(extension);
+  }
+
+  FOR_EACH_OBSERVER(Observer, observers_, BrowserActionMoved(extension, index));
+}
+
 void ExtensionToolbarModel::Observe(NotificationType type,
                                     const NotificationSource& source,
                                     const NotificationDetails& details) {
   if (type == NotificationType::EXTENSIONS_READY) {
     for (size_t i = 0; i < service_->extensions()->size(); ++i) {
       Extension* extension = service_->GetExtensionById(
           service_->extensions()->at(i)->id(), false);
       AddExtension(extension);
     }
     return;
@@ skipping 24 matching lines @@
 }
 
 void ExtensionToolbarModel::RemoveExtension(Extension* extension) {
   ExtensionList::iterator pos = std::find(begin(), end(), extension);
   if (pos != end()) {
     toolitems_.erase(pos);
     FOR_EACH_OBSERVER(Observer, observers_,
                       BrowserActionRemoved(extension));
   }
 }