Fixing iframe jank in the local omnibox popup.

chrome/browser/search/instant_io_context.h

Index: chrome/browser/search/instant_io_context.h
diff --git a/chrome/browser/search/instant_io_context.h b/chrome/browser/search/instant_io_context.h
index d061fa8859ed9b0ea3c7a5212738a52e6c2c79aa..658a7c140ed60f5ab69bf0f5d8dce43a9022d388 100644
--- a/chrome/browser/search/instant_io_context.h
+++ b/chrome/browser/search/instant_io_context.h
@@ -44,7 +44,7 @@ class InstantIOContext : public base::RefCountedThreadSafe<InstantIOContext> {
   // processes.  Used to keep process IDs in sync with InstantService.
   static void AddInstantProcessOnIO(
       scoped_refptr<InstantIOContext> instant_io_context,
-      int process_id);
+      int process_id, const GURL& site_url);
   static void RemoveInstantProcessOnIO(
       scoped_refptr<InstantIOContext> instant_io_context,
       int process_id);
@@ -60,6 +60,9 @@ class InstantIOContext : public base::RefCountedThreadSafe<InstantIOContext> {
   // process.
   static bool ShouldServiceRequest(const net::URLRequest* request);
 
+  // Returns the expected origin of a request from an Instant process.
+  static std::string GetExpectedOrigin(const net::URLRequest* request);
+
   // If there is a mapping for the |most_visited_item_id|, sets |url| and
   // returns true.
   static bool GetURLForMostVisitedItemID(
@@ -77,6 +80,9 @@ class InstantIOContext : public base::RefCountedThreadSafe<InstantIOContext> {
   // |process_ids_|.
   bool IsInstantProcess(int process_id) const;
 
+  // Gets the site associated with the given Instant process.
+  std::string GetSiteForInstantProcess(int process_id) const;
+
   bool GetURLForMostVisitedItemID(InstantRestrictedID most_visited_item_id,
                                   GURL* url) const;
 
@@ -85,6 +91,9 @@ class InstantIOContext : public base::RefCountedThreadSafe<InstantIOContext> {
   // thread.
   std::set<int> process_ids_;
 
+  // The site URLs associated with Instant processes. See |process_ids_|.
+  std::map<int, std::string> process_sites_;
+
   // The Most Visited item cache. Mirror of the Most Visited item cache in
   // InstantService. Duplicated here for synchronous access on the IO thread.
   InstantRestrictedIDCache<InstantMostVisitedItem> most_visited_item_cache_;