views: Make view::Views::GetPreferredSize() const.

ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc

 // 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.
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/controls/tabbed_pane/tabbed_pane.h"
 #include "ui/views/test/views_test_base.h"
 
 using base::ASCIIToUTF16;
 
 namespace views {
 
 namespace {
 
 // A view for testing that takes a fixed preferred size upon construction.
 class FixedSizeView : public View {
  public:
   explicit FixedSizeView(const gfx::Size& size)
     : size_(size) {}
 
   // Overridden from View:
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
+  virtual gfx::Size GetPreferredSize() const OVERRIDE {
     return size_;
   }
 
  private:
   const gfx::Size size_;
 
   DISALLOW_COPY_AND_ASSIGN(FixedSizeView);
 };
 
 typedef ViewsTestBase TabbedPaneTest;
@@ skipping 50 matching lines @@
   // Add a tab at index 0, it should not be selected automatically.
   View* tab0 = new View();
   tabbed_pane->AddTabAtIndex(0, ASCIIToUTF16("tab0"), tab0);
   EXPECT_NE(tab0, tabbed_pane->GetSelectedTab());
   EXPECT_NE(0, tabbed_pane->selected_tab_index());
 }
 
 }  // namespace
 
 }  // namespace views