Skeleton for app_list on OSX, and refactoring for enable_app_list=1 on OS=="mac".

ui/app_list/app_list_background.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 "ui/app_list/app_list_background.h"
-
-#include "third_party/skia/include/core/SkPaint.h"
-#include "third_party/skia/include/core/SkPath.h"
-#include "ui/app_list/app_list_constants.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/skia_util.h"
-#include "ui/views/view.h"
-
-namespace {
-
-const SkColor kSearchBoxBackground = SK_ColorWHITE;
-
-// Colors and sizes of top separator between searchbox and grid view.
-const SkColor kTopSeparatorColor = SkColorSetRGB(0xE5, 0xE5, 0xE5);
-const int kTopSeparatorSize = 1;
-
-}  // namespace
-
-namespace app_list {
-
-AppListBackground::AppListBackground(int corner_radius,
-                                     views::View* search_box_view)
-    : corner_radius_(corner_radius),
-      search_box_view_(search_box_view) {
-}
-
-AppListBackground::~AppListBackground() {
-}
-
-void AppListBackground::Paint(gfx::Canvas* canvas,
-                              views::View* view) const {
-  gfx::Rect bounds = view->GetContentsBounds();
-
-  canvas->Save();
-  SkPath path;
-  // Contents corner radius is 1px smaller than border corner radius.
-  SkScalar radius = SkIntToScalar(corner_radius_ - 1);
-  path.addRoundRect(gfx::RectToSkRect(bounds), radius, radius);
-  canvas->ClipPath(path);
-
-  SkPaint paint;
-  paint.setStyle(SkPaint::kFill_Style);
-
-  const gfx::Rect search_box_view_bounds =
-      search_box_view_->ConvertRectToWidget(search_box_view_->GetLocalBounds());
-  gfx::Rect search_box_rect(bounds.x(),
-                            bounds.y(),
-                            bounds.width(),
-                            search_box_view_bounds.bottom() - bounds.y());
-
-  paint.setColor(kSearchBoxBackground);
-  canvas->DrawRect(search_box_rect, paint);
-
-  gfx::Rect seperator_rect(search_box_rect);
-  seperator_rect.set_y(seperator_rect.bottom());
-  seperator_rect.set_height(kTopSeparatorSize);
-  canvas->FillRect(seperator_rect, kTopSeparatorColor);
-
-  gfx::Rect contents_rect(bounds.x(),
-                          seperator_rect.bottom(),
-                          bounds.width(),
-                          bounds.bottom() - seperator_rect.bottom());
-
-  paint.setColor(kContentsBackgroundColor);
-  canvas->DrawRect(contents_rect, paint);
-  canvas->Restore();
-}
-
-}  // namespace app_list