[Material][Mac] Replace the default favicon with a vector

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
index 3fdfe3bf78b475bb30126945746445036a6f30be..99611e5fd0c23b5155c82e86f924408ca6959286 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
@@ -1505,7 +1505,12 @@ private:
     if (icon)
       image = skia::SkBitmapToNSImageWithColorSpace(*icon, colorSpace);
   } else {
-    image = mac::FaviconForWebContents(contents);
+    TabController* tab = [tabArray_ firstObject];
+    NSColor* titleColor = [[tab tabView] titleColor];
+    NSColor* deviceColor =
+        [titleColor colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
+    image = mac::FaviconForWebContents(
+        contents, skia::NSDeviceColorToSkColor(deviceColor));
   }
 
   // Either we don't have a valid favicon or there was some issue converting it