Add an error for obsolete raw strings (issue 4815)

Add an error for obsolete raw strings (issue 4815)
Committed: https://code.google.com/p/dart/source/detail?r=13780

[Brian Wilkerson, 2012-10-17 18:20:02]

I believe that the VM no longer accepts the old syntax, so generating an error
shouldn't cause problems for anyone.

[danrubel, 2012-10-17 21:55:35]

lgtm

http://codereview.chromium.org/11196025/diff/1/compiler/javatests/com/google/...
File compiler/javatests/com/google/dart/compiler/parser/NegativeParserTest.java
(right):

http://codereview.chromium.org/11196025/diff/1/compiler/javatests/com/google/...
compiler/javatests/com/google/dart/compiler/parser/NegativeParserTest.java:359:
parseExpectWarnings(
Perhaps it should be an error rather than a warning?
We want to forcefully suggest folks move to the new syntax.
Plus there is an *easy* cleanup wizard :-)

[danrubel, 2012-10-17 21:57:17]

http://codereview.chromium.org/11196025/diff/1/compiler/javatests/com/google/...
File compiler/javatests/com/google/dart/compiler/parser/NegativeParserTest.java
(right):

http://codereview.chromium.org/11196025/diff/1/compiler/javatests/com/google/...
compiler/javatests/com/google/dart/compiler/parser/NegativeParserTest.java:359:
parseExpectWarnings(
On 2012/10/17 21:55:35, danrubel wrote:
> Perhaps it should be an error rather than a warning?
> We want to forcefully suggest folks move to the new syntax.
> Plus there is an *easy* cleanup wizard :-)

Sorry. It is an error. The "parseExpectWarning" threw me off.

[scheglov, 2012-10-18 01:13:50]

LGTM