harmony: fix sizing on webusb chooser dialog

chrome/browser/ui/views/device_chooser_content_view.cc

 // Copyright 2016 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/device_chooser_content_view.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/numerics/safe_conversions.h"
 #include "chrome/app/vector_icons/vector_icons.h"
+#include "chrome/browser/ui/views/harmony/layout_delegate.h"
 #include "chrome/grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "ui/views/controls/styled_label.h"
@@ skipping 83 matching lines @@
   // and in that case, the system won't be able to scan for devices, so
   // the throbber won't be shown at the same time.
   turn_adapter_off_help_->SetPosition(
       gfx::Point((rect.width() - turn_adapter_off_help_->width()) / 2,
                  (rect.height() - turn_adapter_off_help_->height()) / 2));
   turn_adapter_off_help_->SizeToFit(rect.width() -
                                     2 * kAdapterOffHelpLinkPadding);
   views::View::Layout();
 }
 
+gfx::Size DeviceChooserContentView::GetPreferredSize() const {
+  constexpr int kHeight = 320;
+  constexpr int kDefaultWidth = 402;
+  int width = LayoutDelegate::Get()->GetDialogPreferredWidth(
+      LayoutDelegate::DialogWidth::MEDIUM);
+  if (!width)
+    width = kDefaultWidth;
+  return gfx::Size(width, kHeight);
+}
+
 int DeviceChooserContentView::RowCount() {
   // When there are no devices, the table contains a message saying there
   // are no devices, so the number of rows is always at least 1.
   return std::max(base::checked_cast<int>(chooser_controller_->NumOptions()),
                   1);
 }
 
 base::string16 DeviceChooserContentView::GetText(int row, int column_id) {
   int num_options = base::checked_cast<int>(chooser_controller_->NumOptions());
   if (num_options == 0) {
@@ skipping 191 matching lines @@
 }
 
 void DeviceChooserContentView::SetGetHelpAndReScanLink() {
   DCHECK(footnote_link_);
   footnote_link_->SetText(help_and_re_scan_text_);
   footnote_link_->AddStyleRange(
       help_text_range_, views::StyledLabel::RangeStyleInfo::CreateForLink());
   footnote_link_->AddStyleRange(
       re_scan_text_range_, views::StyledLabel::RangeStyleInfo::CreateForLink());
 }