Migrated several tests from blink to V8 repository.

test/webkit/parse-backslash-before-newline.js

Index: test/webkit/parse-backslash-before-newline.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/parse-backslash-before-newline.js
similarity index 85%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/parse-backslash-before-newline.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..d0a6fec58a91e1e61d99017dd3c7daeabcef5675 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/parse-backslash-before-newline.js
@@ -21,11 +21,13 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-description(
-"Tests the behavior of Array.prototype.concat while the array is having a bad time due to one of the elements we are concatenating."
-);
+shouldBe('"test\
+string with CR LF"', '"teststring with CR LF"');
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+shouldBe('"test\
+
string with LF CR"', '"teststring with LF CR"');
 
+shouldBe('"test\
string with CR"', '"teststring with CR"');
 
+shouldBe('"test\
+string with LF"', '"teststring with LF"');