Convert location bar decorations to Material Design (Mac).

chrome/browser/ui/cocoa/location_bar/save_credit_card_decoration.h

Index: chrome/browser/ui/cocoa/location_bar/save_credit_card_decoration.h
diff --git a/chrome/browser/ui/cocoa/location_bar/save_credit_card_decoration.h b/chrome/browser/ui/cocoa/location_bar/save_credit_card_decoration.h
index 7301018b288d4f610cd7416627eba725bf5ec0fc..7275dee2be0dc7f672db45d0472833e538a01bc8 100644
--- a/chrome/browser/ui/cocoa/location_bar/save_credit_card_decoration.h
+++ b/chrome/browser/ui/cocoa/location_bar/save_credit_card_decoration.h
@@ -20,6 +20,10 @@ class SaveCreditCardDecoration : public ImageDecoration {
   explicit SaveCreditCardDecoration(CommandUpdater* command_updater);
   ~SaveCreditCardDecoration() override;
 
+  // Sets up the SaveCreditCardDecoration's icon, which can't be set without
+  // knowing the window's theme.
+  void SetIcon(bool locationBarIsDark);
+
   // LocationBarDecoration implementation:
   bool AcceptsMousePress() override;
   bool OnMousePressed(NSRect frame, NSPoint location) override;
@@ -30,6 +34,9 @@ class SaveCreditCardDecoration : public ImageDecoration {
   // For showing the save credit card bubble.
   CommandUpdater* command_updater_;  // Weak, owned by Browser.
 
+  // true if the SaveCreditCardDecoration's icon has been initialized.
+  bool icon_initialized_;
+
   DISALLOW_COPY_AND_ASSIGN(SaveCreditCardDecoration);
 };