Track confidence calculations better. Reduce minimum user text length.

chrome/browser/autocomplete/network_action_predictor_unittest.cc

Index: chrome/browser/autocomplete/network_action_predictor_unittest.cc
diff --git a/chrome/browser/autocomplete/network_action_predictor_unittest.cc b/chrome/browser/autocomplete/network_action_predictor_unittest.cc
index 09a8b466e3c22c63213ea96b62cc8cda91446db0..ce5a7c2010e4eba9df23777802188dcfb98fb6e7 100644
--- a/chrome/browser/autocomplete/network_action_predictor_unittest.cc
+++ b/chrome/browser/autocomplete/network_action_predictor_unittest.cc
@@ -38,11 +38,11 @@ struct TestUrlInfo {
 } 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,
@@ -62,7 +62,7 @@ struct TestUrlInfo {
     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,