Add Hide and Show to the app list SearchBoxView.

ui/app_list/views/search_box_view_unittest.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 "ui/app_list/views/search_box_view.h"
 
 #include <cctype>
 #include <map>
 
 #include "base/strings/utf_string_conversions.h"
@@ skipping 26 matching lines @@
     return false;
   }
   int count_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyPressCounterView);
 };
 
 class SearchBoxViewTest : public views::test::WidgetTest,
                           public SearchBoxViewDelegate {
  public:
-  SearchBoxViewTest() : query_changed_count_(0) {}
+  SearchBoxViewTest() : query_changed_count_(0), visibility_changed_count_(0) {}
   virtual ~SearchBoxViewTest() {}
 
   // Overridden from testing::Test:
   virtual void SetUp() OVERRIDE {
     views::test::WidgetTest::SetUp();
     widget_ = CreateTopLevelPlatformWidget();
     view_ = new SearchBoxView(this, &view_delegate_);
     counter_view_ = new KeyPressCounterView();
     widget_->GetContentsView()->AddChildView(view_);
     widget_->GetContentsView()->AddChildView(counter_view_);
@@ skipping 40 matching lines @@
     last_query_.clear();
     return base::UTF16ToUTF8(query);
   }
 
   int GetQueryChangedCountAndReset() {
     int result = query_changed_count_;
     query_changed_count_ = 0;
     return result;
   }
 
+  int GetVisibilityChangedCountAndReset() {
+    int result = visibility_changed_count_;
+    visibility_changed_count_ = 0;
+    return result;
+  }
+
  private:
   // Overridden from SearchBoxViewDelegate:
   virtual void QueryChanged(SearchBoxView* sender) OVERRIDE {
     ++query_changed_count_;
     last_query_ = sender->search_box()->text();
   }
 
+  virtual void SearchBoxVisibilityChanged(SearchBoxView* sender) OVERRIDE {
+    ++visibility_changed_count_;
+  }
+
   AppListTestViewDelegate view_delegate_;
   views::Widget* widget_;
   SearchBoxView* view_;
   KeyPressCounterView* counter_view_;
   base::string16 last_query_;
   int query_changed_count_;
+  int visibility_changed_count_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBoxViewTest);
 };
 
 TEST_F(SearchBoxViewTest, Basic) {
   KeyPress(ui::VKEY_A);
   EXPECT_EQ("a", GetLastQueryAndReset());
   EXPECT_EQ(1, GetQueryChangedCountAndReset());
   EXPECT_EQ(0, GetContentsViewKeyPressCountAndReset());
 
@@ skipping 21 matching lines @@
   KeyPress(ui::VKEY_DOWN);
   EXPECT_NE(base::TimeDelta(), GetAutoLaunchTimeout());
   ResetAutoLaunchTimeout();
 
   // Clearing search box also cancels.
   SetLongAutoLaunchTimeout();
   view()->ClearSearch();
   EXPECT_EQ(base::TimeDelta(), GetAutoLaunchTimeout());
 }
 
+TEST_F(SearchBoxViewTest, VisibilityChange) {
+  view()->Show();
+  EXPECT_EQ(1, GetVisibilityChangedCountAndReset());
+
+  view()->Hide();
+  EXPECT_EQ(1, GetVisibilityChangedCountAndReset());
+}
+
 }  // namespace test
 }  // namespace app_list