Draggable peeking/fullscreen launcher with transparent background.

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 9633deea6f1ffe33e8760fc43e53962ad4fd218c..7dc23809972c80485e211a3375eae2bff6f5b534 100644
--- a/ui/app_list/app_list_constants.cc
+++ b/ui/app_list/app_list_constants.cc
@@ -3,12 +3,16 @@
 // found in the LICENSE file.
 
 #include "ui/app_list/app_list_constants.h"
-
 #include "build/build_config.h"
+#include "ui/app_list/app_list_features.h"
 #include "ui/gfx/color_palette.h"
 
 namespace app_list {
 
+namespace fullscreen_constants {
+const size_t kNumStartPageTiles = 5;
+}  // namespace fullscreen_constants
+
 const SkColor kContentsBackgroundColor = SkColorSetRGB(0xF2, 0xF2, 0xF2);
 const SkColor kSearchBoxBackground = SK_ColorWHITE;