Introduce FastShowPickler which will be used for app list cold start.

chrome/browser/ui/app_list/fast_show_pickler_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/app_list/fast_show_pickler.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkColorPriv.h"
+#include "ui/app_list/app_list_item_model.h"
+#include "ui/app_list/app_list_model.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/skia_util.h"
+
+
+using app_list::AppListItemModel;
+using app_list::AppListModel;
+
+class AppListModelPicklerUnitTest : public testing::Test {
+ protected:
+  void CheckIsSame(AppListModel* m1, AppListModel* m2) {
+    ASSERT_EQ(m1->apps()->item_count(), m2->apps()->item_count());
+    ASSERT_EQ(m1->signed_in(), m2->signed_in());
+    for (size_t i = 0; i < m1->apps()->item_count(); i++) {
+      ASSERT_EQ(m1->apps()->GetItemAt(i)->app_id(),
+                m2->apps()->GetItemAt(i)->app_id());
+      ASSERT_EQ(m1->apps()->GetItemAt(i)->title(),
+                m2->apps()->GetItemAt(i)->title());
+      CompareImages(m1->apps()->GetItemAt(i)->icon(),
+                    m2->apps()->GetItemAt(i)->icon());
+    }
+  }
+
+  void CompareImages(const gfx::ImageSkia& image1,
+                     const gfx::ImageSkia& image2) {
+    std::vector<gfx::ImageSkiaRep> reps1(image1.image_reps());
+    std::vector<gfx::ImageSkiaRep> reps2(image2.image_reps());
+    ASSERT_EQ(reps1.size(), reps2.size());
+    for (size_t i = 0; i < reps1.size(); ++i) {
+      ASSERT_TRUE(
+          gfx::BitmapsAreEqual(reps1[i].sk_bitmap(), reps2[i].sk_bitmap()));
+      ASSERT_EQ(reps1[i].scale_factor(), reps2[i].scale_factor());
+    }
+  }
+
+  scoped_ptr<AppListModel> CopyViaPickle(AppListModel* model) {
+    scoped_ptr<Pickle> pickle(
+        FastShowPickler::PickleAppListModelForFastShow(model));
+    return FastShowPickler::UnpickleAppListModelForFastShow(pickle.get());
+  }
+
+  void DoConsistencyChecks(AppListModel* model) {
+    scoped_ptr<AppListModel> model2(CopyViaPickle(model));
+    AppListModel dest_model;
+    FastShowPickler::CopyOver(model2.get(), &dest_model);
+
+    CheckIsSame(model, model2.get());
+    CheckIsSame(model, &dest_model);
+    CheckIsSame(model2.get(), &dest_model);
+  }
+
+  gfx::ImageSkia MakeImage() {
+    const int kWidth = 10;
+    const int kHeight = 10;
+    SkBitmap bitmap;
+    bitmap.setConfig(SkBitmap::kARGB_8888_Config, kWidth, kHeight);
+    bitmap.allocPixels();
+    bitmap.eraseARGB(255, 1, 2, 3);
+    return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
+  }
+};
+
+TEST_F(AppListModelPicklerUnitTest, EmptyModel) {
+  AppListModel model;
+  DoConsistencyChecks(&model);
+}
+
+TEST_F(AppListModelPicklerUnitTest, OneItem) {
+  AppListModel model;
+  AppListItemModel* app1 = new AppListItemModel;
+  app1->set_app_id("abc");
+  app1->SetTitle("hello, there");
+  model.apps()->Add(app1);
+
+  DoConsistencyChecks(&model);
+}
+
+TEST_F(AppListModelPicklerUnitTest, TwoItems) {
+  AppListModel model;
+  AppListItemModel* app1 = new AppListItemModel;
+  app1->set_app_id("abc");
+  app1->SetTitle("hello, there");
+  model.apps()->Add(app1);
+
+  AppListItemModel* app2 = new AppListItemModel;
+  app2->set_app_id("abc2");
+  app2->SetTitle("hello, there 2");
+  model.apps()->Add(app2);
+
+  DoConsistencyChecks(&model);
+}
+
+TEST_F(AppListModelPicklerUnitTest, Images) {
+  AppListModel model;
+  AppListItemModel* app1 = new AppListItemModel;
+  app1->set_app_id("abc");
+  app1->SetTitle("hello, there");
+  app1->SetIcon(MakeImage(), true);
+  model.apps()->Add(app1);
+
+  AppListItemModel* app2 = new AppListItemModel;
+  app2->set_app_id("abc2");
+  app2->SetTitle("hello, there 2");
+  model.apps()->Add(app2);
+
+  DoConsistencyChecks(&model);
+}