Mac: make save/open dialogs operate as tab-modal sheets....

chrome/browser/shell_dialogs.h

Index: chrome/browser/shell_dialogs.h
diff --git a/chrome/browser/shell_dialogs.h b/chrome/browser/shell_dialogs.h
index f9a3baae413c656ac0544b500d132a93561422cf..b89c1b0d65bb852ad2f4e145baaa0164b9026cc3 100644
--- a/chrome/browser/shell_dialogs.h
+++ b/chrome/browser/shell_dialogs.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2009 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.
 
@@ -13,6 +13,8 @@
 #include "base/ref_counted.h"
 #include "base/string16.h"
 
+class TabContents;
+
 namespace gfx {
 class Font;
 }
@@ -21,8 +23,12 @@ class Font;
 class BaseShellDialog {
  public:
   // Returns true if a shell dialog box is currently being shown modally
-  // to the specified owner.
+  // to the specified owner. (For tab-modals, one should provide a default
+  // implementations which just produces a window-modal; hence our default
+  // implementation just returns false.)
   virtual bool IsRunning(gfx::NativeWindow owning_window) const = 0;
+  virtual bool IsRunningInTab(const TabContents* parent_tab) const
+      { return false; }
 
   // Notifies the dialog box that the listener has been destroyed and it should
   // no longer be sent notifications.
@@ -117,6 +123,19 @@ class SelectFileDialog
                           const FilePath::StringType& default_extension,
                           gfx::NativeWindow owning_window,
                           void* params) = 0;
+
+  // Same as SelectFile(), with nearly identical arguments, except that -- on
+  // platforms where this is supported -- it will display a tab-modal dialog box
+  // for the tab specified by |owning_tab| (if it is NULL, this will yield a
+  // modeless dialog). More than one instance can be shown per window.
+  virtual void SelectFileInTab(Type type,
+                               const string16& title,
+                               const FilePath& default_path,
+                               const FileTypeInfo* file_types,
+                               int file_type_index,
+                               const FilePath::StringType& default_extension,
+                               TabContents* owning_tab,
+                               void* params) = 0;
 };
 
 // Shows a dialog box for selecting a font.