Move chrome-specific SerializedNavigation code to chrome/.

components/sessions/core/serialized_navigation_driver.h

Index: components/sessions/core/serialized_navigation_driver.h
diff --git a/components/sessions/core/serialized_navigation_driver.h b/components/sessions/core/serialized_navigation_driver.h
index 5fc261e4a95c5915f0c3dc2fef55beb33ad14352..3c04735b3a9e281b12a46fdd14e7fc970a3118df 100644
--- a/components/sessions/core/serialized_navigation_driver.h
+++ b/components/sessions/core/serialized_navigation_driver.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "base/callback.h"
 #include "components/sessions/core/sessions_export.h"
 
 namespace sessions {
@@ -18,11 +19,14 @@ class SerializedNavigationEntry;
 // must be provided by the driver on each platform.
 class SESSIONS_EXPORT SerializedNavigationDriver {
  public:
-  virtual ~SerializedNavigationDriver() {}
+  using SanitizeCallback = base::Callback<void(SerializedNavigationEntry*)>;

[sky, 2017/03/21 14:47:39]

This seems like a roundabout way of overriding Sanitize. How come you didn't
make chrome code subclass ContentSerializedNavigationDriver and override
Sanitize?

[Lei Zhang, 2017/03/21 17:12:51]

Wouldn't I need to move SerializedNavigationDriver::Get() and
ContentSerializedNavigationDriver::GetInstance() out of components/ then?

[sky, 2017/03/21 17:50:59]

Good point. How about having setters that content and chrome call?

 
   // Returns the singleton SerializedNavigationDriver.
   static SerializedNavigationDriver* Get();
 
+  // Sets the callback to use for Sanitize().
+  static void SetSanitizeCallback(const SanitizeCallback& callback);
+
   // Returns the default referrer policy.
   virtual int GetDefaultReferrerPolicy() const = 0;
 
@@ -50,6 +54,9 @@ class SESSIONS_EXPORT SerializedNavigationDriver {
   // Removes the referrer from the encoded page state.
   virtual std::string StripReferrerFromPageState(
       const std::string& page_state) const = 0;
+
+ protected:
+  virtual ~SerializedNavigationDriver() {}
 };
 
 }  // namespace sessions