Consistently use namespaced base::Version.

components/variations/study_filtering_unittest.cc

Index: components/variations/study_filtering_unittest.cc
diff --git a/components/variations/study_filtering_unittest.cc b/components/variations/study_filtering_unittest.cc
index 0715432a5836795761fe0b5b663cd31a06b50416..0c9dfa06e358860778445a887efa284da099c315 100644
--- a/components/variations/study_filtering_unittest.cc
+++ b/components/variations/study_filtering_unittest.cc
@@ -280,8 +280,8 @@ TEST(VariationsStudyFilteringTest, CheckStudyVersion) {
 
   for (size_t i = 0; i < arraysize(min_test_cases); ++i) {
     filter.set_min_version(min_test_cases[i].min_version);
-    const bool result =
-        internal::CheckStudyVersion(filter, Version(min_test_cases[i].version));
+    const bool result = internal::CheckStudyVersion(
+        filter, base::Version(min_test_cases[i].version));
     EXPECT_EQ(min_test_cases[i].expected_result, result) <<
         "Min. version case " << i << " failed!";
   }
@@ -289,8 +289,8 @@ TEST(VariationsStudyFilteringTest, CheckStudyVersion) {
 
   for (size_t i = 0; i < arraysize(max_test_cases); ++i) {
     filter.set_max_version(max_test_cases[i].max_version);
-    const bool result =
-        internal::CheckStudyVersion(filter, Version(max_test_cases[i].version));
+    const bool result = internal::CheckStudyVersion(
+        filter, base::Version(max_test_cases[i].version));
     EXPECT_EQ(max_test_cases[i].expected_result, result) <<
         "Max version case " << i << " failed!";
   }
@@ -302,16 +302,14 @@ TEST(VariationsStudyFilteringTest, CheckStudyVersion) {
       filter.set_max_version(max_test_cases[j].max_version);
 
       if (!min_test_cases[i].expected_result) {
-        const bool result =
-            internal::CheckStudyVersion(
-                filter, Version(min_test_cases[i].version));
+        const bool result = internal::CheckStudyVersion(
+            filter, base::Version(min_test_cases[i].version));
         EXPECT_FALSE(result) << "Case " << i << "," << j << " failed!";
       }
 
       if (!max_test_cases[j].expected_result) {
-        const bool result =
-            internal::CheckStudyVersion(
-                filter, Version(max_test_cases[j].version));
+        const bool result = internal::CheckStudyVersion(
+            filter, base::Version(max_test_cases[j].version));
         EXPECT_FALSE(result) << "Case " << i << "," << j << " failed!";
       }
     }