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

chrome/browser/ui/views/frame/browser_view_layout_unittest.cc

 // Copyright 2013 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 "chrome/browser/ui/views/frame/browser_view_layout.h"
 
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/frame/browser_view_layout_delegate.h"
 #include "chrome/browser/ui/views/frame/contents_layout_manager.h"
 #include "chrome/browser/ui/views/frame/immersive_mode_controller.h"
@@ skipping 71 matching lines @@
 // A simple view that prefers an initial size.
 class MockView : public views::View {
  public:
   explicit MockView(gfx::Size initial_size)
       : size_(initial_size) {
     SetBoundsRect(gfx::Rect(gfx::Point(), size_));
   }
   virtual ~MockView() {}
 
   // views::View overrides:
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
+  virtual gfx::Size GetPreferredSize() const OVERRIDE {
     return size_;
   }
 
  private:
   gfx::Size size_;
 
   DISALLOW_COPY_AND_ASSIGN(MockView);
 };
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 155 matching lines @@
   const int kBottom = 500;
   EXPECT_EQ(kBottom, layout()->LayoutDownloadShelf(kBottom));
 
   // Download shelf layout moves up the bottom edge and sets visibility.
   delegate()->set_download_shelf_needs_layout(true);
   download_shelf->SetVisible(false);
   EXPECT_EQ(450, layout()->LayoutDownloadShelf(kBottom));
   EXPECT_TRUE(download_shelf->visible());
   EXPECT_EQ("0,450 0x50", download_shelf->bounds().ToString());
 }