Mac: Make it easier for views to correctly draw with a theme.

chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
index ffaefda7e471cdbd11b5fc8ead11dba4c7c33c5e..449e766609570dc5d02f802cf3c28cafe23de351 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
@@ -416,6 +416,16 @@ BookmarkButton* gDraggedButton = nil; // Weak
   [super drawRect:rect];
 }
 
+// ThemedWindowDrawing implementation.
+
+- (void)windowDidChangeTheme {
+  [self setNeedsDisplay:YES];
+}
+
+- (void)windowDidChangeActive {
+  [self setNeedsDisplay:YES];
+}
+
 @end
 
 @implementation BookmarkButton(Private)