base: Move SplitStringUsingSubstr functions from string_util.h to string_split.h

base/string_util_unittest.cc

Index: base/string_util_unittest.cc
diff --git a/base/string_util_unittest.cc b/base/string_util_unittest.cc
index b317d836b968153415e546d0189c100ff0f56a2a..f0524bee2a4b84908bbca87c5b0a53fd0636005e 100644
--- a/base/string_util_unittest.cc
+++ b/base/string_util_unittest.cc
@@ -1230,49 +1230,4 @@ TEST(StringUtilTest, ContainsOnlyChars) {
   EXPECT_FALSE(ContainsOnlyChars("123a", "4321"));
 }
 
-TEST(SplitStringUsingSubstrTest, EmptyString) {
-  std::vector<std::string> results;
-  SplitStringUsingSubstr("", "DELIMITER", &results);
-  ASSERT_EQ(1u, results.size());
-  EXPECT_THAT(results, ElementsAre(""));
-}
-
-TEST(SplitStringUsingSubstrTest, StringWithNoDelimiter) {
-  std::vector<std::string> results;
-  SplitStringUsingSubstr("alongwordwithnodelimiter", "DELIMITER", &results);
-  ASSERT_EQ(1u, results.size());
-  EXPECT_THAT(results, ElementsAre("alongwordwithnodelimiter"));
-}
-
-TEST(SplitStringUsingSubstrTest, LeadingDelimitersSkipped) {
-  std::vector<std::string> results;
-  SplitStringUsingSubstr(
-      "DELIMITERDELIMITERDELIMITERoneDELIMITERtwoDELIMITERthree",
-      "DELIMITER",
-      &results);
-  ASSERT_EQ(6u, results.size());
-  EXPECT_THAT(results, ElementsAre("", "", "", "one", "two", "three"));
-}
-
-TEST(SplitStringUsingSubstrTest, ConsecutiveDelimitersSkipped) {
-  std::vector<std::string> results;
-  SplitStringUsingSubstr(
-      "unoDELIMITERDELIMITERDELIMITERdosDELIMITERtresDELIMITERDELIMITERcuatro",
-      "DELIMITER",
-      &results);
-  ASSERT_EQ(7u, results.size());
-  EXPECT_THAT(results, ElementsAre("uno", "", "", "dos", "tres", "", "cuatro"));
-}
-
-TEST(SplitStringUsingSubstrTest, TrailingDelimitersSkipped) {
-  std::vector<std::string> results;
-  SplitStringUsingSubstr(
-      "unDELIMITERdeuxDELIMITERtroisDELIMITERquatreDELIMITERDELIMITERDELIMITER",
-      "DELIMITER",
-      &results);
-  ASSERT_EQ(7u, results.size());
-  EXPECT_THAT(
-      results, ElementsAre("un", "deux", "trois", "quatre", "", "", ""));
-}
-
 }  // namespace base