First version of the time slicing on the urls. Not ready for review yet.

chrome/common/extensions/api/history.json

 [
   {
     "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."},
@@ skipping 40 matching lines @@
           {
             "name": "callback",
             "type": "function",
             "parameters": [
               { "name": "results", "type": "array", "items": { "$ref": "HistoryItem"} }
             ]
           }
         ]
       },
       {
+        "name": "getMostVisited",
+        "type": "function",
+        "description": "Retrieves most visited URLs on the time specified.",
+        "parameters": [
+          {
+            "name": "details",
+            "type": "object",
+            "properties": {
+              "startTime": {"type": "number", "optional": true, "description": "Limit results to those visited between this and |endTime| on each day, represented in milliseconds since the epoch."},
+              "endTime": {"type": "number", "optional": true, "description": "Limit results to those visited between |startTime| and this on each day, represented in milliseconds since the epoch."},
+              "dayOfTheWeek": {"type": "integer", "optional": true, "minimum": 0, "description": "Limit results to those visited on this day of the week (0 - Sunday, 1 - Monday, etc.) starting with this week."},
+              "maxResults": {"type": "integer", "optional": true, "minimum": 0, "description": "The maximum number of results to retrieve.  Defaults to 100."}
+            }
+          },
+          {
+            "name": "callback",
+            "type": "function",
+            "parameters": [
+              { "name": "results", "type": "array", "items": { "$ref": "HistoryItem"} }
+            ]
+          }
+        ]
+      },
+      {
         "name": "getVisits",
         "type": "function",
         "description": "Retrieves 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."}
             }
@@ skipping 84 matching lines @@
             "properties": {
               "allHistory": { "type": "boolean", "description": "True if all history was removed.  If true, then urls will be empty." },
               "urls": { "type": "array", "items": { "type": "string" }, "optional": true}
             }
           }
         ]
       }
     ]
   }
 ]