Track confidence calculations better. Reduce minimum user text length.

chrome/browser/autocomplete/network_action_predictor_unittest.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/autocomplete/network_action_predictor.h"
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
@@ skipping 20 matching lines @@
   GURL url;
   string16 title;
   int days_from_now;
   string16 user_text;
   int number_of_hits;
   int number_of_misses;
   NetworkActionPredictor::Action expected_action;
 } test_url_db[] = {
   { GURL("http://www.testsite.com/a.html"),
     ASCIIToUTF16("Test - site - just a test"), 1,
-    ASCIIToUTF16("just"), 5, 0,
+    ASCIIToUTF16("j"), 5, 0,
     NetworkActionPredictor::ACTION_PRERENDER },
   { GURL("http://www.testsite.com/b.html"),
     ASCIIToUTF16("Test - site - just a test"), 1,
-    ASCIIToUTF16("just"), 3, 0,
+    ASCIIToUTF16("ju"), 3, 0,
     NetworkActionPredictor::ACTION_PRERENDER },
   { GURL("http://www.testsite.com/c.html"),
     ASCIIToUTF16("Test - site - just a test"), 5,
     ASCIIToUTF16("just"), 3, 1,
     NetworkActionPredictor::ACTION_PRECONNECT },
   { GURL("http://www.testsite.com/d.html"),
     ASCIIToUTF16("Test - site - just a test"), 5,
     ASCIIToUTF16("just"), 3, 0,
     NetworkActionPredictor::ACTION_PRERENDER },
   { GURL("http://www.testsite.com/e.html"),
     ASCIIToUTF16("Test - site - just a test"), 8,
     ASCIIToUTF16("just"), 3, 1,
     NetworkActionPredictor::ACTION_PRECONNECT },
   { GURL("http://www.testsite.com/f.html"),
     ASCIIToUTF16("Test - site - just a test"), 8,
     ASCIIToUTF16("just"), 3, 0,
     NetworkActionPredictor::ACTION_PRERENDER },
   { GURL("http://www.testsite.com/g.html"),
     ASCIIToUTF16("Test - site - just a test"), 12,
-    ASCIIToUTF16("j"), 5, 0,
+    ASCIIToUTF16(""), 5, 0,
     NetworkActionPredictor::ACTION_NONE },
   { GURL("http://www.testsite.com/h.html"),
     ASCIIToUTF16("Test - site - just a test"), 21,
     ASCIIToUTF16("just a test"), 2, 0,
     NetworkActionPredictor::ACTION_NONE },
   { GURL("http://www.testsite.com/i.html"),
     ASCIIToUTF16("Test - site - just a test"), 28,
     ASCIIToUTF16("just a test"), 2, 0,
     NetworkActionPredictor::ACTION_NONE }
 };
@@ skipping 284 matching lines @@
         (test_url_db[i].expected_action ==
          NetworkActionPredictor::ACTION_PRERENDER) ?
             NetworkActionPredictor::ACTION_PRECONNECT :
             test_url_db[i].expected_action;
 
     EXPECT_EQ(expected,
               predictor()->RecommendAction(test_url_db[i].user_text, match))
         << "Unexpected action for " << match.destination_url;
   }
 }