Improve error recovery in formal parameter lists

Improve error recovery in formal parameter lists

Committed: https://code.google.com/p/dart/source/detail?r=6309

[zundel, 2012-04-07 13:28:01]

Adds some improved recovery for formal parameter lists (defining methods,
typedefs and functions)

Added some test cases for cases that were fixed in my previous commit that I
forgot to test.

Also, I turned on save actions in my eclipse and it automatically cleaned up
some problems.

http://codereview.chromium.org/10021013/diff/3001/compiler/javatests/com/goog...
File compiler/javatests/com/google/dart/compiler/parser/ParserRecoveryTest.java
(right):

http://codereview.chromium.org/10021013/diff/3001/compiler/javatests/com/goog...
compiler/javatests/com/google/dart/compiler/parser/ParserRecoveryTest.java:345:
public void testPropertyAccessInInitializerListRecovery1() {
this wan't broken before, I just added a test.

http://codereview.chromium.org/10021013/diff/3001/compiler/javatests/com/goog...
compiler/javatests/com/google/dart/compiler/parser/ParserRecoveryTest.java:446:
public void testPropertyAccessInExpressionList1() {
This test was fixed by the @Terminals annotation on parseExpressionList already
committed, but there was no test.

[zundel, 2012-04-07 15:39:10]

@Steve, I'm thinking this change should help some in completion of library
prefixes when used for function definitions.

[scheglov, 2012-04-07 21:11:08]

lgtm