Use the max use count on autofill profile merge.

components/autofill/core/browser/autofill_profile_unittest.cc

 // Copyright 2013 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 "components/autofill/core/browser/autofill_profile.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 862 matching lines @@
 }
 
 TEST(AutofillProfileTest, MergeDataFrom_SameProfile) {
   AutofillProfile a;
   SetupTestProfile(a);
 
   // The profile has no full name yet. Merge will add it.
   AutofillProfile b = a;
   b.set_guid(base::GenerateGUID());
   EXPECT_TRUE(a.MergeDataFrom(b, "en-US"));
-  EXPECT_EQ(2u, a.use_count());
+  EXPECT_EQ(1u, a.use_count());
 
   // Now the profile is fully populated. Merging it again has no effect (except
   // for usage statistics).
   AutofillProfile c = a;
   c.set_guid(base::GenerateGUID());
   c.set_use_count(3);
   EXPECT_FALSE(a.MergeDataFrom(c, "en-US"));
-  EXPECT_EQ(5u, a.use_count());
+  EXPECT_EQ(3u, a.use_count());
 }
 
 TEST(AutofillProfileTest, OverwriteName_AddNameFull) {
   AutofillProfile a;
 
   a.SetRawInfo(NAME_FIRST, base::ASCIIToUTF16("Marion"));
   a.SetRawInfo(NAME_MIDDLE, base::ASCIIToUTF16("Mitchell"));
   a.SetRawInfo(NAME_LAST, base::ASCIIToUTF16("Morrison"));
 
   AutofillProfile b = a;
@@ skipping 324 matching lines @@
   // The first, middle and last names should be kept and name full should be
   // added.
   EXPECT_EQ(base::ASCIIToUTF16("Marion"), a.GetRawInfo(NAME_FIRST));
   EXPECT_EQ(base::ASCIIToUTF16("Mitchell"), a.GetRawInfo(NAME_MIDDLE));
   EXPECT_EQ(base::ASCIIToUTF16("Morrison"), a.GetRawInfo(NAME_LAST));
   EXPECT_EQ(base::ASCIIToUTF16("Marion Mitchell Morrison"),
             a.GetRawInfo(NAME_FULL));
 }
 
 }  // namespace autofill