Move history API out of experimental. Allow extensions to override history page.

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "unprivileged": true,
     "types": [
       {
         "id": "MessageSender",
         "type": "object",
         "description": "An object containing information about the script context that sent a message or request.",
         "properties": {
@@ skipping 1740 matching lines @@
       },
       {
         "name": "onImportEnded",
         "type": "function",
         "description": "Fired when a bookmark import session is ended.",
         "parameters": []
       }
     ]
   },
   {
-    "namespace": "experimental.history",
+    "namespace": "history",
     "types": [
       {
         "id": "HistoryItem",
         "type": "object",
         "description": "An object encapsulating one result of a history query.",
         "properties": {
           "id": {"type": "string", "minimum": 0, "description": "The unique identifier for the item."},
           "url": {"type": "string", "optional": true, "description": "The URL navigated to by a user."},
           "title": {"type": "string", "optional": true, "description": "The title of the history page."},
           "lastVisitTime": {"type": "number", "optional": true, "description": "When this page was last loaded, represented in milliseconds since the epoch."},
           "visitCount": {"type": "integer", "optional": true, "description": "The number of times the user has navigated to this page."},
           "typedCount": {"type": "integer", "optional": true, "description": "The number of times the user has navigated to this page by typing in the address."}
         }
       },
       {
         "id": "VisitItem",
         "type": "object",
         "description": "An object encapsulating one visit to a URL.",
         "properties": {
           "id": {"type": "string", "minimum": 0, "description": "The unique identifier for the item."},
           "visitId": {"type": "string", "description": "The unique identifier for this visit."},
           "visitTime": {"type": "number", "optional": true, "description": "When this visit occurred, represented in milliseconds since the epoch."},
           "referringVisitId": {"type": "string", "description": "The visit_id of the referrer."},
-          "transition": {"type": "integer", "minimum": 0, "maximum": 10, "description": "The <a href='#transition_types'>transition type</a> for this visit from its referrer."}
+          "transition": {
+            "type": "string",
+            "enum": ["link", "typed", "auto_bookmark", "auto_subframe", "manual_subframe", "generated", "start_page", "form_submit", "reload", "keyword", "keyword_generated"],
+            "description": "The <a href='#transition_types'>transition type</a> for this visit from its referrer."
+          }
         }
       }
     ],
     "functions": [
       {
         "name": "search",
         "type": "function",
         "description": "Search the history for the last visit time of each page matching the query.",
         "parameters": [
           {
@@ skipping 14 matching lines @@
             ]
           }
         ]
       },
       {
         "name": "getVisits",
         "type": "function",
         "description": "Retrieve information about visits to a URL.",
         "parameters": [
           {
+            "name": "details",
             "type": "object",
             "properties": {
               "url": {"type": "string", "description": "The URL for which to retrieve visit information.  It must be in the format as returned from a call to history.search."}
             }
           },
           {
             "name": "callback",
             "type": "function",
             "parameters": [
               { "name": "results", "type": "array", "items": { "$ref": "VisitItem"} }
             ]
           }
         ]
       },
       {
         "name": "addUrl",
         "type": "function",
-        "description": "Adds a URL to the history at the current time with a <a href='#transition_types'>transition type</a> of LINK.",
+        "description": "Adds a URL to the history at the current time with a <a href='#transition_types'>transition type</a> of \"link\".",
         "parameters": [
           {
+            "name": "details",
             "type": "object",
             "properties": {
               "url": {"type": "string", "description": "The URL to add."}
             }
           }
         ]
       },
       {
         "name": "deleteUrl",
         "type": "function",
         "description": "Removes all occurrences of the given URL from the history.",
         "parameters": [
           {
+            "name": "details",
             "type": "object",
             "properties": {
               "url": {"type": "string", "description": "The URL to remove."}
             }
           }
         ]
       },
       {
         "name": "deleteRange",
         "type": "function",
         "description": "Removes all items within the specified date range from the history.  Pages will not be removed from the history unless all visits fall within the range.",
         "parameters": [
           {
+            "name": "range",
             "type": "object",
             "properties": {
               "startTime": { "type": "number", "description": "Items added to history after this date, represented in milliseconds since the epoch." },
               "endTime": { "type": "number", "description": "Items added to history before this date, represented in milliseconds since the epoch." }
             }
           },
           {
             "name": "callback", "type": "function", "parameters": []
           }
         ]
@@ skipping 766 matching lines @@
         "description": "Triggers a paste operation in the specified tab.",
         "parameters": [
           {"type": "integer", "name": "tabId", "minimum": 0},
           {"type": "function", "name": "callback", "optional": true, "parameters": []}
         ]
       }
     ],
     "events": []
   }
 ]