Fill the launcher with all found apps.

ui/app_list/search/history.cc

Index: ui/app_list/search/history.cc
diff --git a/ui/app_list/search/history.cc b/ui/app_list/search/history.cc
index 7277ad38520e20083db9c6952e2f87c8cc8b56bc..1fcbc03a20c871c1aeab4acf4b6e7bdd980833ca 100644
--- a/ui/app_list/search/history.cc
+++ b/ui/app_list/search/history.cc
@@ -28,7 +28,7 @@ std::string NormalizeString(const std::string& utf8) {
 History::History(scoped_refptr<HistoryDataStore> store)
     : store_(store), data_loaded_(false) {
   const size_t kMaxQueryEntries = 1000;
-  const size_t kMaxSecondaryQueries = 5;
+  const size_t kMaxSecondaryQueries = 8;

[mtomasz, 2016/07/19 07:07:56]

(Not sure if this change is necessary.)

[Matt Giuca, 2016/07/19 07:29:10]

I don't know what this is and I don't think it's relevant. If you change it, you
should get xiyuan@ to look.

[xiyuan, 2016/07/19 15:22:55]

Matt is right that this is not relevant to what this CL tries to improve.
Applist search history remembers query -> launched-result mapping. It is a
one-to-many mapping. The primary one get boost score and we remember additional
launched results using the same query as secondary to get a less boost score.
And if a secondary result is launched using the query twice in a row, it is
promoted to primary. See [1]. This number must be greater than 2. 5 is somewhat
chosen arbitrarily. Changing to 8 probably will not get us more benefits but
will increase the history data size.

[1]:
https://cs.chromium.org/chromium/src/ui/app_list/search/history_data.h?rcl=14...

[mtomasz, 2016/07/20 00:46:48]

Removed. Done.

 
   data_.reset(
       new HistoryData(store_.get(), kMaxQueryEntries, kMaxSecondaryQueries));