app_list: Fix possible out of bounds index.

ui/app_list/test/app_list_test_model.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 "ui/app_list/test/app_list_test_model.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "grit/ui_resources.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/app_list/app_list_constants.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
 
 namespace app_list {
 namespace test {
 
+gfx::ImageSkia CreateImageSkia(int width, int height) {
+  SkBitmap bitmap;
+  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+  bitmap.allocPixels();
+  bitmap.eraseARGB(255, 0, 255, 0);
+  return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
+}
+
 // static
 const char AppListTestModel::kItemType[] = "TestItem";
 
 // AppListTestModel::AppListTestItem
 
 AppListTestModel::AppListTestItem::AppListTestItem(
     const std::string& id,
     AppListTestModel* model)
     : AppListItem(id),
       model_(model) {
+  SetIcon(CreateImageSkia(kPreferredIconDimension, kPreferredIconDimension),
+          false /* has_shadow */);
 }
 
 AppListTestModel::AppListTestItem::~AppListTestItem() {
 }
 
 void AppListTestModel::AppListTestItem::Activate(int event_flags) {
   model_->ItemActivated(this);
 }
 
 const char* AppListTestModel::AppListTestItem::GetItemType() const {
@@ skipping 51 matching lines @@
   return static_cast<AppListFolderItem*>(merged_item);
 }
 
 AppListFolderItem* AppListTestModel::CreateAndAddOemFolder(
     const std::string& id) {
   AppListFolderItem* folder =
       new AppListFolderItem(id, AppListFolderItem::FOLDER_TYPE_OEM);
   return static_cast<AppListFolderItem*>(AddItem(folder));
 }
 
+AppListFolderItem* AppListTestModel::CreateSingleItemFolder(
+    const std::string& folder_id,
+    const std::string& item_id) {
+  AppListTestItem* item = CreateItem(item_id);
+  AddItemToFolder(item, folder_id);
+  AppListItem* folder_item = FindItem(folder_id);
+  DCHECK(folder_item->GetItemType() == AppListFolderItem::kItemType);
+  return static_cast<AppListFolderItem*>(folder_item);
+}
+
 void AppListTestModel::PopulateAppWithId(int id) {
   CreateAndAddItem(GetItemName(id));
 }
 
 std::string AppListTestModel::GetModelContent() {
   std::string content;
   for (size_t i = 0; i < top_level_item_list()->item_count(); ++i) {
     if (i > 0)
       content += ',';
     content += top_level_item_list()->item_at(i)->id();
@@ skipping 28 matching lines @@
   item->SetHighlighted(true);
 }
 
 void AppListTestModel::ItemActivated(AppListTestItem* item) {
   last_activated_ = item;
   ++activate_count_;
 }
 
 }  // namespace test
 }  // namespace app_list