Add a DummySearchBoxView to the experimental app list start page.

ui/app_list/app_list_constants.cc

Index: ui/app_list/app_list_constants.cc
diff --git a/ui/app_list/app_list_constants.cc b/ui/app_list/app_list_constants.cc
index 3838a7a2e04f8c2aa695274e4b2baf515a912f8b..5b66b5fe9d29c7f9c30ccc68c565f964268cb150 100644
--- a/ui/app_list/app_list_constants.cc
+++ b/ui/app_list/app_list_constants.cc
@@ -32,6 +32,9 @@ const SkColor kResultURLTextColor = SkColorSetRGB(0x00, 0x99, 0x33);
 const SkColor kGridTitleColor = SkColorSetRGB(0x5A, 0x5A, 0x5A);
 const SkColor kGridTitleHoverColor = SkColorSetRGB(0x3C, 0x3C, 0x3C);
 
+// Color of the borders used in the experimental app list start page.
+const SkColor kStartPageBorderColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
+
 // Color of the folder ink bubble.
 const SkColor kFolderBubbleColor = SkColorSetRGB(0xD7, 0xD7, 0xD7);