Notify the change of brand color from renderer to Brower

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index 4f600acd5804c5cf37b59777475a8c21a56991b4..c946b027c96a51f71ec4f39ec4d19d4fd2b8818c 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -13,6 +13,7 @@
 #include "content/public/common/page_transition_types.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/window_open_disposition.h"
 
 namespace content {
@@ -328,6 +329,9 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   virtual void AccessibilityEventReceived(
       const std::vector<AXEventNotificationDetails>& details) {}
 
+  // Invoked when brand color is changed to |brand_color|.
+  virtual void DidChangeBrandColor(SkColor brand_color) {}
+
   // Invoked if an IPC message is coming from a specific RenderFrameHost.
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  RenderFrameHost* render_frame_host);