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

apps/ui/views/app_window_frame_view.cc

 // Copyright 2014 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 "apps/ui/views/app_window_frame_view.h"
 
 #include "apps/ui/native_app_window.h"
 #include "base/strings/utf_string_conversions.h"
 #include "extensions/common/draggable_region.h"
 #include "grit/theme_resources.h"
@@ skipping 211 matching lines @@
 
   // Caption is a safe default.
   return HTCAPTION;
 }
 
 void AppWindowFrameView::GetWindowMask(const gfx::Size& size,
                                        gfx::Path* window_mask) {
   // We got nothing to say about no window mask.
 }
 
-gfx::Size AppWindowFrameView::GetPreferredSize() {
+gfx::Size AppWindowFrameView::GetPreferredSize() const {
   gfx::Size pref = widget_->client_view()->GetPreferredSize();
   gfx::Rect bounds(0, 0, pref.width(), pref.height());
   return widget_->non_client_view()
       ->GetWindowBoundsForClientBounds(bounds)
       .size();
 }
 
 void AppWindowFrameView::Layout() {
   if (!draw_frame_)
     return;
@@ skipping 66 matching lines @@
   path.moveTo(0, 0);
   path.lineTo(width(), 0);
   path.lineTo(width(), kCaptionHeight);
   path.lineTo(0, kCaptionHeight);
   path.close();
   canvas->DrawPath(path, paint);
 }
 
 const char* AppWindowFrameView::GetClassName() const { return kViewClassName; }
 
-gfx::Size AppWindowFrameView::GetMinimumSize() {
+gfx::Size AppWindowFrameView::GetMinimumSize() const {
   gfx::Size min_size = widget_->client_view()->GetMinimumSize();
   if (!draw_frame_)
     return min_size;
 
   // Ensure we can display the top of the caption area.
   gfx::Rect client_bounds = GetBoundsForClientView();
   min_size.Enlarge(0, client_bounds.y());
   // Ensure we have enough space for the window icon and buttons.  We allow
   // the title string to collapse to zero width.
   int closeButtonOffsetX = (kCaptionHeight - close_button_->height()) / 2;
@@ skipping 61 matching lines @@
     restore_button_->SetImage(
         views::CustomButton::STATE_NORMAL,
         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE).ToImageSkia());
     minimize_button_->SetImage(
         views::CustomButton::STATE_NORMAL,
         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE).ToImageSkia());
   }
 }
 
 }  // namespace apps