[Mac] Fix rough-looking profile picker text, especially with a dark theme.

chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h

Index: chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h b/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
index 5639540901345c5cd8f251195c12c5f6b27ec6e6..f75f7e03e977eecd44ddcee52e88a7b2faab2961 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
@@ -9,11 +9,11 @@
 
 #import "chrome/browser/ui/cocoa/themed_window.h"
 
-// A view that draws the theme image in the top area of the window (behind the
-// tab strip area). It should be arranged so that its z-order is below its
-// overlapping sibling views (window controls, tab strip view, profile button
-// and fullscreen button).
+// A view that draws the theme and transparency effects behind the tab strip.
+// It should be behind its overlapping sibling views (window controls, tab
+// strip view, profile button and fullscreen button).
 @interface TabStripBackgroundView : NSView<ThemedWindowDrawing>
+@property(nonatomic) BOOL inATabDraggingOverlayWindow;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_BACKGROUND_VIEW_H_