Fix background colour for Cocoa app list on hover

ui/app_list/cocoa/apps_search_results_controller.mm

 // Copyright 2013 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.
 
 #import "ui/app_list/cocoa/apps_search_results_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 11 matching lines @@
 const CGFloat kIconDimension = 32;
 const CGFloat kIconPadding = 14;
 const CGFloat kIconViewWidth = kIconDimension + 2 * kIconPadding;
 const CGFloat kTextTrailPadding = kIconPadding;
 
 // Map background styles to represent selection and hover in the results list.
 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 ()
 
 - (void)loadAndSetViewWithResultsFrameSize:(NSSize)size;
 - (void)mouseDown:(NSEvent*)theEvent;
 - (void)tableViewClicked:(id)sender;
 - (app_list::AppListModel::SearchResults*)searchResults;
 - (void)activateSelection;
 - (BOOL)moveSelectionByDelta:(NSInteger)delta;
@@ skipping 372 matching lines @@
 }
 
 @end
 
 @implementation AppsSearchResultsCell
 
 - (void)drawWithFrame:(NSRect)cellFrame
                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;
     backgroundRect.origin.y -= 1;
     backgroundRect.size.height += 1;
     NSRectFill(backgroundRect);
   }
 
   NSAttributedString* titleText = [self attributedStringValue];
   NSRect titleRect = cellFrame;
@@ skipping 18 matching lines @@
       std::min(iconSize.height, kIconDimension));
   [resultIcon drawInRect:iconRect
                 fromRect:NSZeroRect
                operation:NSCompositeSourceOver
                 fraction:1.0
           respectFlipped:YES
                    hints:nil];
 }
 
 @end