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

ui/views/controls/single_split_view_unittest.cc

 // Copyright (c) 2011 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 "ui/views/controls/single_split_view.h"
 
 #include "base/logging.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/controls/single_split_view_listener.h"
 
@@ skipping 46 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(SingleSplitViewListenerImpl);
 };
 
 class MinimumSizedView: public views::View {
  public:
   MinimumSizedView(gfx::Size min_size) : min_size_(min_size) {}
 
  private:
   gfx::Size min_size_;
-  virtual gfx::Size GetMinimumSize() OVERRIDE;
+  virtual gfx::Size GetMinimumSize() const OVERRIDE;
 };
 
-gfx::Size MinimumSizedView::GetMinimumSize() {
+gfx::Size MinimumSizedView::GetMinimumSize() const {
   return min_size_;
 }
 
 }  // namespace
 
 namespace views {
 
 TEST(SingleSplitViewTest, Resize) {
   // Test cases to iterate through for horizontal and vertical split views.
   struct TestCase {
@@ skipping 140 matching lines @@
             split.divider_offset());
 
   // Expect intial offset after a system/user gesture cancels the drag.
   // This shouldn't occur after mouse release, but it's sufficient for testing.
   split.OnMouseCaptureLost();
   EXPECT_EQ(kInitialDividerOffset, split.divider_offset());
   EXPECT_EQ(5, listener.count());
 }
 
 }  // namespace views