Extract a minimal subset of WebDialogUI/WebDialogDelegate from src/chrome -> src/ui/web_dialogs

ui/web_dialogs/web_dialog_web_contents_delegate.h

Index: ui/web_dialogs/web_dialog_web_contents_delegate.h
===================================================================
--- ui/web_dialogs/web_dialog_web_contents_delegate.h	(revision 0)
+++ ui/web_dialogs/web_dialog_web_contents_delegate.h	(revision 0)
@@ -0,0 +1,53 @@
+// 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 UI_WEB_DIALOGS_WEB_DIALOG_WEB_CONTENTS_DELEGATE_H_
+#define UI_WEB_DIALOGS_WEB_DIALOG_WEB_CONTENTS_DELEGATE_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "content/public/browser/web_contents_delegate.h"
+#include "ui/web_dialogs/web_dialogs_export.h"
+
+namespace content {
+  class BrowserContext;
+}
+
+namespace web_dialogs {
+
+// This class implements (and mostly ignores) most of
+// content::WebContentsDelegate for use in a Web dialog. Subclasses need only
+// override a few methods instead of the everything from
+// content::WebContentsDelegate; this way, implementations on all platforms
+// behave consistently.
+class WEB_DIALOGS_EXPORT WebDialogWebContentsDelegate
+    : public content::WebContentsDelegate {
+ public:
+  // Context must be non-NULL.
+  explicit WebDialogWebContentsDelegate(content::BrowserContext* context);
+
+  virtual ~WebDialogWebContentsDelegate();
+
+  // The returned profile is guaranteed to be original if non-NULL.
+  content::BrowserContext* context() const;
+
+  // Calling this causes all following events sent from the
+  // WebContents object to be ignored.  It also makes all following
+  // calls to context() return NULL.
+  void Detach();
+
+  // content::WebContentsDelegate declarations.
+  virtual bool IsPopupOrPanel(
+      const content::WebContents* source) const OVERRIDE;
+  virtual bool ShouldAddNavigationToHistory(
+      const history::HistoryAddPageArgs& add_page_args,
+      content::NavigationType navigation_type) OVERRIDE;
+
+ private:
+  content::BrowserContext* context_;  // Weak pointer.
+
+  DISALLOW_COPY_AND_ASSIGN(WebDialogWebContentsDelegate);
+};
+}  // namespace web_dialogs
+#endif  // UI_WEB_DIALOGS_WEB_DIALOG_WEB_CONTENTS_DELEGATE_H_