[Mac][Material Design] Adjust Omnibox focus ring color for Incognito mode.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm
index 2a0e7da4f0a41475947a6de4839279db5a3de3cb..9a7f19458c6e251b0a40e57056834e745b385678 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm
@@ -421,10 +421,15 @@ size_t CalculatePositionsInFrame(
 
     CGFloat alphaComponent = 0.5 / singlePixelLineWidth_;
     if (isModeMaterial && inDarkMode) {
-      alphaComponent = 1;
+      // Special focus color for Material Incognito.
+      [[NSColor colorWithSRGBRed:123 / 255.
+                           green:170 / 255.
+                            blue:247 / 255.
+                           alpha:1] set];
+    } else {
+      [[[NSColor keyboardFocusIndicatorColor]
+          colorWithAlphaComponent:alphaComponent] set];
     }
-    [[[NSColor keyboardFocusIndicatorColor]
-        colorWithAlphaComponent:alphaComponent] set];
     [path stroke];
   }
 }