Add some additional test coverage for Version code.

Was double-checking the logic here and realized we didn't
have any unit test coverage for CompareToWildcardString when
wildcards are not passed to it.

BUG=none

Change-Id: I5c30032138b2fc28e3fdaa590756e95dae829234
Reviewed-on: https://chromium-review.googlesource.com/804755
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521364}

base/version_unittest.cc

@@ -103,12 +103,19 @@ TEST(VersionTest, Compare) {
       {"1.0.3", "1.0.20", -1},
       {"11.0.10", "15.007.20011", -1},
       {"11.0.10", "15.5.28.130162", -1},
+      {"15.5.28.130162", "15.5.28.130162", 0},
   };
   for (size_t i = 0; i < arraysize(cases); ++i) {
     base::Version lhs(cases[i].lhs);
     base::Version rhs(cases[i].rhs);
     EXPECT_EQ(lhs.CompareTo(rhs), cases[i].expected) <<
         cases[i].lhs << " ? " << cases[i].rhs;
+    // CompareToWildcardString() should have same behavior as CompareTo() when
+    // no wildcards are present.
+    EXPECT_EQ(lhs.CompareToWildcardString(cases[i].rhs), cases[i].expected)
+        << cases[i].lhs << " ? " << cases[i].rhs;
+    EXPECT_EQ(rhs.CompareToWildcardString(cases[i].lhs), -cases[i].expected)
+        << cases[i].lhs << " ? " << cases[i].rhs;
 
     // Test comparison operators
     switch (cases[i].expected) {