Add new methods to create constrained windows for print preview and release the internal TabConte...

chrome/browser/ui/webui/constrained_html_ui.h

Index: chrome/browser/ui/webui/constrained_html_ui.h
===================================================================
--- chrome/browser/ui/webui/constrained_html_ui.h	(revision 105522)
+++ chrome/browser/ui/webui/constrained_html_ui.h	(working copy)
@@ -23,6 +23,20 @@
   // Called when the dialog is being closed in response to a "DialogClose"
   // message from WebUI.
   virtual void OnDialogCloseFromWebUI() = 0;
+
+  // If called, on dialog closure, the dialog will release its TabContents
+  // instead of destroying it. After which point, the caller will own the
+  // released TabContents.
+  virtual void ReleaseTabContentsOnDialogClose() = 0;
+
+  // Returns the ConstrainedWindow.
+  virtual ConstrainedWindow* window() = 0;
+
+  // Returns the TabContentsWrapper owned by the constrained window.
+  virtual TabContentsWrapper* tab() = 0;
+
+ protected:
+  virtual ~ConstrainedHtmlUIDelegate() {}
 };
 
 // ConstrainedHtmlUI is a facility to show HTML WebUI content
@@ -41,7 +55,7 @@
   // Create a constrained HTML dialog. The actual object that gets created
   // is a ConstrainedHtmlUIDelegate, which later triggers construction of a
   // ConstrainedHtmlUI object.
-  static ConstrainedWindow* CreateConstrainedHtmlDialog(
+  static ConstrainedHtmlUIDelegate* CreateConstrainedHtmlDialog(
       Profile* profile,
       HtmlDialogUIDelegate* delegate,
       TabContentsWrapper* overshadowed);