Move chrome-specific SerializedNavigation code to chrome/.

chrome/browser/browser_about_handler.cc

Index: chrome/browser/browser_about_handler.cc
diff --git a/chrome/browser/browser_about_handler.cc b/chrome/browser/browser_about_handler.cc
index 96c0189a0006c579826dc135d95f151de0c89700..a89d62b817375383b7648ce2fd1c6227bcbe737e 100644
--- a/chrome/browser/browser_about_handler.cc
+++ b/chrome/browser/browser_about_handler.cc
@@ -21,7 +21,6 @@
 #include "chrome/common/url_constants.h"
 #include "components/url_formatter/url_fixer.h"
 #include "content/public/common/content_features.h"
-#include "content/public/common/url_constants.h"
 #include "extensions/features/features.h"
 
 #if !defined(OS_ANDROID)
@@ -87,7 +86,7 @@ bool WillHandleBrowserAboutURL(GURL* url,
     path = chrome::kChromeUIExtensionsHost;
 #endif  // BUILDFLAG(ENABLE_EXTENSIONS)
   // Redirect chrome://history.
-  } else if (host == content::kChromeUIHistoryHost) {
+  } else if (host == chrome::kChromeUIHistoryHost) {
 #if defined(OS_ANDROID)
     // TODO(twellington): remove this after native Android history launches.
     // See http://crbug.com/654071.
@@ -100,11 +99,11 @@ bool WillHandleBrowserAboutURL(GURL* url,
     // Material design history is handled on the top-level chrome://history
     // host.
     if (base::FeatureList::IsEnabled(features::kMaterialDesignHistory)) {
-      host = content::kChromeUIHistoryHost;
+      host = chrome::kChromeUIHistoryHost;
       path = url->path();
     } else {
       host = chrome::kChromeUIUberHost;
-      path = content::kChromeUIHistoryHost + url->path();
+      path = chrome::kChromeUIHistoryHost + url->path();
     }
 #endif
   // Redirect chrome://settings, unless MD settings is enabled.