Also add a test for when the first argument is null or undefined, as there are no tests that cover this currently.

BUG=v8:5364

Review-Url: https://codereview.chromium.org/2399423003
Cr-Commit-Position: refs/heads/master@{#40127}

The ES2015 specification requires that String.prototype.startsWith,
String.prototype.endsWith and String.prototype.includes use the IsRegExp
internal algorithm to determine whether to throw a TypeError to prevent
a RegExp from being accidentally cast to a String for those methods.
That internal algorithm checks the presence/truthiness of Symbol.match
to make its determination. This patch switches the builtins to use
this correct test, rather than checking for the [[RegExpMatcher]]
internal slot as the builtins previously did.

R=yangguo

Review URL: https://codereview.chromium.org/1762183002

Cr-Commit-Position: refs/heads/master@{#34547}

String functions are shipping since 4.1/Chrome M41, it is time to unflag.

R=yanngguo@chromium.org,rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1024813002

Cr-Commit-Position: refs/heads/master@{#27337}

Per TC39 Nov 2014 decison.

R=arv@chromium.org,yangguo@chromium.org
LOG=Y

Committed: https://chromium.googlesource.com/v8/v8/+/b5379216e23ff0ec734e70361dd07057c2421c96

Review URL: https://codereview.chromium.org/742963002

Cr-Commit-Position: refs/heads/master@{#25448}

Revert of Rename String.prototype.contains to 'includes'. (patchset #1 id:1 of https://codereview.chromium.org/742963002/)

Reason for revert:
Breaks test262-es6:
http://build.chromium.org/p/client.v8/builders/V8%20Linux/builds/1289

Original issue's description:
> Rename String.prototype.contains to 'includes'.
>
> Per TC39 Nov 2014 decison.
>
> R=arv@chromium.org,yangguo@chromium.org
> LOG=Y
>
> Committed: https://chromium.googlesource.com/v8/v8/+/b5379216e23ff0ec734e70361dd07057c2421c96

TBR=arv@chromium.org,yangguo@chromium.org,dslomov@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/745543002

Cr-Commit-Position: refs/heads/master@{#25432}

Per TC39 Nov 2014 decison.

R=arv@chromium.org,yangguo@chromium.org
LOG=Y

Review URL: https://codereview.chromium.org/742963002

Cr-Commit-Position: refs/heads/master@{#25430}