signin: force web signin flow initiated visits to accounts.google.com to their own process.

chrome/browser/ui/webui/sync_promo/sync_promo_ui.h

Index: chrome/browser/ui/webui/sync_promo/sync_promo_ui.h
diff --git a/chrome/browser/ui/webui/sync_promo/sync_promo_ui.h b/chrome/browser/ui/webui/sync_promo/sync_promo_ui.h
index decb4024d08959b7652dc035ca877e5396ae05d3..36b83bf4f80da4231bf97b7937e3777365b1b0af 100644
--- a/chrome/browser/ui/webui/sync_promo/sync_promo_ui.h
+++ b/chrome/browser/ui/webui/sync_promo/sync_promo_ui.h
@@ -28,6 +28,13 @@ class SyncPromoUI : public content::WebUIController {
   // Constructs a SyncPromoUI.
   explicit SyncPromoUI(content::WebUI* web_ui);
 
+  // This is used to distinguish URLs belonging to the special web signin flow
+  // running in the special signin process from other URLs on the same domain.
+  // We do not grant WebUI privilieges / bindings to this process or to URLs of
+  // this scheme; enforcement of privileges is handled separately by
+  // OneClickSigninHelper.
+  static const char* kChromeSigninEffectiveURL;
+
   // Returns true if the sync promo should be visible.
   // |profile| is the profile of the tab the promo would be shown on.
   static bool ShouldShowSyncPromo(Profile* profile);
@@ -79,6 +86,10 @@ class SyncPromoUI : public content::WebUIController {
   // Forces UseWebBasedSigninFlow() to return true when set; used in tests only.
   static void ForceWebBasedSigninFlowForTesting(bool force);
 
+  // Returns true if |url| is a web signin URL and should be hosted in an
+  // isolated, privileged signin process.
+  static bool IsWebBasedSigninFlowURL(const GURL& url);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncPromoUI);
 };