content: Split off ChromeTabContentsViewGtk from TabContentsViewGtk. This new

chrome/browser/tab_contents/tab_contents_view_wrapper_gtk.h

+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_WRAPPER_GTK_H_
+#define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_WRAPPER_GTK_H_
+#pragma once
+
+#include <gtk/gtk.h>
+
+#include "ui/gfx/native_widget_types.h"
+
+class TabContentsViewGtk;
+class ContextMenuParams;
+
+// An object that supplies the Gtk parent of TabContentsViewGtk. Embedders may
+// want to insert widgets that provide features that live with the
+// TabContentsViewGtk.
+class TabContentsViewWrapperGtk {
+ public:
+  // Initializes the TabContentsViewGtkWrapper by taking |view| and adding it
+  // this object's GtkContainer.
+  virtual void WrapView(TabContentsViewGtk* view) = 0;
+
+  // Returns the top widget that contains |view| passed in from WrapView. This
+  // is exposed through TabContentsViewGtk::GetNativeView() when a wrapper is
+  // supplied to a TabContentsViewGtk.
+  virtual gfx::NativeView GetNativeView() const = 0;
+
+  // Called during the TabContentsViewGtk. Used to associate drag handlers.
+  virtual void OnCreateViewForWidget() = 0;
+
+  // Handles a focus event from the renderer process.
+  virtual void Focus() = 0;
+
+  // Gives TabContentsViewGtkWrapper a first chance at focus events from our
+  // render widget host, before the main view invokes its default
+  // behaviour. Returns TRUE if |return_value| has been set and that value
+  // should be returned to GTK+.
+  virtual gboolean OnNativeViewFocusEvent(GtkWidget* widget,
+                                          GtkDirectionType type,
+                                          gboolean* return_value) = 0;
+
+  // Complete hack because I have no idea where else to put this platform
+  // specific crud.
+  virtual void ShowContextMenu(const ContextMenuParams& params) = 0;
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_WRAPPER_GTK_H_