InstantExtended: Adding InstantRestrictedIDCache.

chrome/common/instant_types.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_INSTANT_TYPES_H_
 #define CHROME_COMMON_INSTANT_TYPES_H_
 
 #include <string>
+#include <utility>
 
 #include "base/string16.h"
 #include "content/public/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 
+// ID used by Instant code to refer to objects (e.g. Autocomplete results, Most
+// Visited items) that the Instant page needs access to.
+typedef int InstantRestrictedID;
+
+// The size of the InstantMostVisitedItem cache.
+const size_t kMaxInstantMostVisitedItemCacheSize = 100;
+
 // Ways that the Instant suggested text is autocompleted into the omnibox.
 enum InstantCompleteBehavior {
   // Autocomplete the suggestion immediately.
   INSTANT_COMPLETE_NOW,
 
   // Do not autocomplete the suggestion. The suggestion may still be displayed
   // in the omnibox, but not made a part of the omnibox text by default (e.g.,
   // by displaying the suggestion as non-highlighted, non-selected gray text).
   INSTANT_COMPLETE_NEVER,
 
@@ skipping 50 matching lines @@
   string16 destination_url;
 
   // The transition type to use when the user opens this match. Same as
   // AutocompleteMatch::transition.
   content::PageTransition transition;
 
   // The relevance score of this match, same as AutocompleteMatch::relevance.
   int relevance;
 };
 
+// An InstantAutocompleteResult along with its assigned restricted ID.
+typedef std::pair<InstantRestrictedID, InstantAutocompleteResult>
+    InstantAutocompleteResultIDPair;
+
 // How to interpret the size (height or width) of the Instant overlay (preview).
 enum InstantSizeUnits {
   // As an absolute number of pixels.
   INSTANT_SIZE_PIXELS,
 
   // As a percentage of the height or width of the containing (parent) view.
   INSTANT_SIZE_PERCENT,
 };
 
 // The alignment of the theme background image.
@@ skipping 38 matching lines @@
 
   // The theme background image tiling is only valid if |theme_id| is valid.
   ThemeBackgroundImageTiling image_tiling;
 
   // The theme background image height.
   // Value is only valid if |theme_id| is valid.
   uint16 image_height;
 };
 
 struct InstantMostVisitedItem {
-  InstantMostVisitedItem() : most_visited_item_id(0) {}
-
-  // A private identifier used on the browser side when retrieving assets.
-  uint64 most_visited_item_id;
-
   // The URL of the Most Visited item.
   GURL url;
 
   // The title of the Most Visited page.  May be empty, in which case the |url|
   // is used as the title.
   string16 title;
 };
 
+// An InstantMostVisitedItem along with its assigned restricted ID.
+typedef std::pair<InstantRestrictedID, InstantMostVisitedItem>
+    InstantMostVisitedItemIDPair;
+
 #endif  // CHROME_COMMON_INSTANT_TYPES_H_