Created min size for print preview dialog and modified to allow the

chrome/browser/ui/webui/constrained_web_dialog_ui.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_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/public/browser/web_ui_controller.h"
@@ skipping 83 matching lines @@
 // of a ConstrainedWebDialogUI object.
 // |browser_context| is used to construct the constrained HTML dialog's
 //                   WebContents.
 // |delegate| controls the behavior of the dialog.
 // |overshadowed| is the tab being overshadowed by the dialog.
 ConstrainedWebDialogDelegate* ShowConstrainedWebDialog(
     content::BrowserContext* browser_context,
     ui::WebDialogDelegate* delegate,
     content::WebContents* overshadowed);
 
+// Create and show a constrained HTML dialog that is a peer rather than a child
+// of the original |web_contents| window. The dialog is top level but does not
+// prevent access to the original |web_contents| and on some platforms
+// (ChromeOS) can extend outside of the original parent window. The actual
+// object that gets created is a ConstrainedWebDialogDelegate, which later
+// triggers construction of a ConstrainedWebDialogUI object. The returned
+// object deletes itself when the dialog closes.
+// |browser_context| is used to construct the constrained HTML dialog's
+//                   WebContents.
+// |delegate| controls the behavior of the dialog.
+// |web_contents| is the tab being covered by the dialog.
+ConstrainedWebDialogDelegate* ShowTopLevelConstrainedWebDialog(
+    content::BrowserContext* browser_context,
+    ui::WebDialogDelegate* delegate,
+    content::WebContents* web_contents);
+
+// Like ShowTopLevelConstrainedWebDialog, but uses |dialog_host_window| as the
+// host window for the dialog rather than the modal dialog host view from the
+// top level window of web_contents. Used for unit test where GetRootView() and
+// GetHostView() may not work as expected.
+ConstrainedWebDialogDelegate* ShowTopLevelConstrainedWebDialogInWindow(
+    content::BrowserContext* browser_context,
+    ui::WebDialogDelegate* delegate,
+    content::WebContents* web_contents,
+    gfx::NativeView dialog_host_window);
+
 // Create and show a constrained HTML dialog with auto-resize enabled. The
 // dialog is shown automatically after document load has completed to avoid UI
 // jankiness.
 // |browser_context| is used to construct the dialog's WebContents.
 // |delegate| controls the behavior of the dialog.
 // |overshadowed| is the tab being overshadowed by the dialog.
 // |min_size| is the minimum size of the dialog.
 // |max_size| is the maximum size of the dialog.
 ConstrainedWebDialogDelegate* ShowConstrainedWebDialogWithAutoResize(
     content::BrowserContext* browser_context,
     ui::WebDialogDelegate* delegate,
     content::WebContents* overshadowed,
     const gfx::Size& min_size,
     const gfx::Size& max_size);
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_