Use centered app list position whenever virtual keyboard is enabled.

chrome/browser/ui/views/app_list/win/app_list_win_unittest.cc

Index: chrome/browser/ui/views/app_list/win/app_list_win_unittest.cc
diff --git a/chrome/browser/ui/views/app_list/win/app_list_win_unittest.cc b/chrome/browser/ui/views/app_list/win/app_list_win_unittest.cc
index 607426ed01d702a723867fee8577f59ebdb9482d..5ac1ff9e05f8d1bf3e324edacf8663b9f1bb9e48 100644
--- a/chrome/browser/ui/views/app_list/win/app_list_win_unittest.cc
+++ b/chrome/browser/ui/views/app_list/win/app_list_win_unittest.cc
@@ -54,6 +54,7 @@ class AppListWinUnitTest : public testing::Test {
     display_.set_work_area(gfx::Rect(0, 0, kScreenWidth, kScreenHeight));
     cursor_ = gfx::Point();
     taskbar_rect_ = gfx::Rect();
+    center_window_ = false;
   }
 
   // Set the display work area.
@@ -99,17 +100,23 @@ class AppListWinUnitTest : public testing::Test {
     cursor_ = gfx::Point(x, y);
   }
 
+  void EnableWindowCentering() {
+    center_window_ = true;
+  }
+
   gfx::Point DoFindAnchorPoint() const {
     return AppListWin::FindAnchorPoint(gfx::Size(kWindowWidth, kWindowHeight),
                                        display_,
                                        cursor_,
-                                       taskbar_rect_);
+                                       taskbar_rect_,
+                                       center_window_);
   }
 
  private:
   gfx::Display display_;
   gfx::Point cursor_;
   gfx::Rect taskbar_rect_;
+  bool center_window_;
 };
 
 TEST_F(AppListWinUnitTest, FindAnchorPointNoTaskbar) {
@@ -242,3 +249,13 @@ TEST_F(AppListWinUnitTest, FindAnchorPointWin8SplitScreen) {
                      kMinDistanceFromEdge),
       DoFindAnchorPoint());
 }
+
+TEST_F(AppListWinUnitTest, FindAnchorPointCentered) {
+  // Cursor on the top taskbar; enable centered app list mode.
+  PlaceTaskbar(AppListPositioner::SCREEN_EDGE_TOP);
+  PlaceCursor(0, 0);
+  EnableWindowCentering();
+  // Expect the app list to be in the center of the screen (ignore the cursor).
+  EXPECT_EQ(gfx::Point(kScreenWidth / 2, kScreenHeight / 2),
+            DoFindAnchorPoint());
+}