DevTools: place DevTools WebContents underneath inspected WebContents.

chrome/browser/ui/views/frame/contents_layout_manager.h

+// Copyright 2013 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_UI_VIEWS_FRAME_CONTENTS_LAYOUT_MANAGER_H_
+#define CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_LAYOUT_MANAGER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "ui/gfx/size.h"
+#include "ui/views/layout/layout_manager.h"
+
+// ContainerLayoutManager is managing WebContents atop of the DevTools.

[sky, 2013/12/06 17:25:44]

ContentsLayoutManager positions the WebContents and devtools WebContents.

[dgozman, 2013/12/09 13:19:18]

Done.

+// It also supports the
+class ContentsLayoutManager : public views::LayoutManager {
+ public:
+  ContentsLayoutManager(views::View* devtools_view, views::View* contents_view);
+  virtual ~ContentsLayoutManager();
+
+  // Sets the active top margin; both devtools_view and contents_view will be
+  // pushed down vertically by |margin|. Returns true if the margin has changed
+  // and InvalidateLayout() is necessary.
+  bool SetActiveTopMargin(int margin);
+
+  // Sets the contents offsets from the sides. Returns true if offsets have
+  // changed and InvalidateLayout() is necessary.
+  bool SetContentsViewOffsets(

[sky, 2013/12/06 17:25:44]

This can InvalidateLayout is you need it to? The View is provided to
LayoutManagers by way of Installed().

[dgozman, 2013/12/09 13:19:18]

Done.

+      const gfx::Size& top_left, const gfx::Size& bottom_right);

[sky, 2013/12/06 17:25:44]

How come this is two sizes? Isn't an Insets what you want?

[dgozman, 2013/12/09 13:19:18]

Missed that class. Thank you! Done.

+
+  // views::LayoutManager overrides:
+  virtual void Layout(views::View* host) OVERRIDE;
+  virtual gfx::Size GetPreferredSize(views::View* host) OVERRIDE;
+
+ private:
+  views::View* devtools_view_;
+  views::View* contents_view_;
+
+  gfx::Size top_left_;
+  gfx::Size bottom_right_;
+  int active_top_margin_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContentsLayoutManager);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_LAYOUT_MANAGER_H_