[Dice] Parse the Dice response header

components/signin/core/browser/dice_header_helper.h

Index: components/signin/core/browser/dice_header_helper.h
diff --git a/components/signin/core/browser/dice_header_helper.h b/components/signin/core/browser/dice_header_helper.h
index b6bf1f64b6594f9fb69d8c9f3153155c06c7ac92..a3a2e98a7142752ebae560806deade895f942204 100644
--- a/components/signin/core/browser/dice_header_helper.h
+++ b/components/signin/core/browser/dice_header_helper.h
@@ -19,6 +19,11 @@ class DiceHeaderHelper : public SigninHeaderHelper {
   DiceHeaderHelper() {}
   ~DiceHeaderHelper() override {}
 
+  // Returns the parameters contained in the X-Chrome-ID-Consistency-Response
+  // response header.
+  static DiceResponseParams BuildDiceResponseParams(
+      const std::string& header_value);
+
  private:
   // SigninHeaderHelper implementation:
   bool IsUrlEligibleForRequestHeader(const GURL& url) override;