extensions: Add ExtensionView interface.

chrome/browser/extensions/extension_view.h

+// 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_H_
+
+#include "ui/gfx/native_widget_types.h"
+
+class Browser;
+class ExtensionViewContainer;
+
+namespace content {
+class RenderViewHost;
+}
+
+namespace extensions {
+class ExtensionHost;
+}
+
+namespace gfx {
+class Size;
+}
+
+// This is a cross platform interface for extension view, and it's owned by
+// ExtensionHost.
+class ExtensionView {
+ public:
+  static ExtensionView* Create(extensions::ExtensionHost* host,
+                               Browser* browser);
+
+  virtual ~ExtensionView() {}
+
+  // Returns the browser the extension belongs to.
+  virtual Browser* GetBrowser() = 0;
+  virtual const Browser* GetBrowser() const = 0;
+
+  // Returns the extension's native view.
+  virtual gfx::NativeView GetNativeView() = 0;
+
+  // Returns the render view host for this extension view.
+  virtual content::RenderViewHost* GetRenderViewHost() const = 0;
+
+  // Sets the container for this view.
+  virtual void SetContainer(ExtensionViewContainer* container) = 0;
+
+  // Used by ExtensionHost to notify the platform-specific implementations about
+  // the correct size for extension contents.
+  virtual void ResizeDueToAutoResize(const gfx::Size& new_size) = 0;
+
+  // Used by ExtensionHost to notify the platform-specific implementations when
+  // the RenderViewHost has a connection.
+  virtual void RenderViewCreated() = 0;
+
+  // Used by ExtensionHost to notify the platform-specific implementations that/
+  // the extension page is loaded.
+  virtual void DidStopLoading() = 0;
+
+  // Informs the view that its containing window's frame changed.
+  virtual void WindowFrameChanged() = 0;
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_VIEW_H_