Fix background colour for Cocoa app list on hover

ui/app_list/cocoa/apps_search_results_controller.mm

Index: ui/app_list/cocoa/apps_search_results_controller.mm
diff --git a/ui/app_list/cocoa/apps_search_results_controller.mm b/ui/app_list/cocoa/apps_search_results_controller.mm
index 95f293f0d71ce473cf207208a4304076ca97b60c..304eb066c064221c29fdf7cc77dbdd2c95ae02bb 100644
--- a/ui/app_list/cocoa/apps_search_results_controller.mm
+++ b/ui/app_list/cocoa/apps_search_results_controller.mm
@@ -29,6 +29,11 @@ const NSBackgroundStyle kBackgroundNormal = NSBackgroundStyleLight;
 const NSBackgroundStyle kBackgroundSelected = NSBackgroundStyleDark;
 const NSBackgroundStyle kBackgroundHovered = NSBackgroundStyleRaised;
 
+// The mouse hover colour (3% black over kContentsBackgroundColor).
+const SkColor kHighlightedRowColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
+// The keyboard select colour (6% black over kContentsBackgroundColor).
+const SkColor kSelectedRowColor = SkColorSetRGB(0xE6, 0xE6, 0xE6);
+
 }  // namespace
 
 @interface AppsSearchResultsController ()
@@ -421,9 +426,9 @@ const NSBackgroundStyle kBackgroundHovered = NSBackgroundStyleRaised;
                inView:(NSView*)controlView {
   if ([self backgroundStyle] != kBackgroundNormal) {
     if ([self backgroundStyle] == kBackgroundSelected)
-      [gfx::SkColorToSRGBNSColor(app_list::kSelectedColor) set];
+      [gfx::SkColorToSRGBNSColor(kSelectedRowColor) set];
     else
-      [gfx::SkColorToSRGBNSColor(app_list::kHighlightedColor) set];
+      [gfx::SkColorToSRGBNSColor(kHighlightedRowColor) set];
 
     // Extend up by one pixel to draw over cell border.
     NSRect backgroundRect = cellFrame;