Generate code for some switch statements.

dart/tests/language/language-leg.status

Index: dart/tests/language/language-leg.status
diff --git a/dart/tests/language/language-leg.status b/dart/tests/language/language-leg.status
index 554cf069bb79cead1b2d6f88b00308049c6ec654..2cac860962d3a17e5a4b7e48b1c98be51194563a 100644
--- a/dart/tests/language/language-leg.status
+++ b/dart/tests/language/language-leg.status
@@ -117,7 +117,6 @@ SuperFieldTest: Fail # no method named city in class B
 SuperOperatorTest: Fail # no method named + in class A
 SuperSetterTest: Fail # Internal Error: SsaBuilder.visitIdentifier on non-this
 SuperTest: Fail # cannot find tokens to produce error message for i++.
-Switch6Test: Fail # switch cases are not implemented
 SwitchFallthruTest: Fail # switch cases are not implemented
 SwitchLabelTest: Fail # switch cases are not implemented
 SwitchScopeTest: Fail # switch cases are not implemented
@@ -281,6 +280,8 @@ StaticTopLevelTest/03: Fail, OK # Negative language test.
 StaticTopLevelTest/04: Fail, OK # Negative language test.
 StaticTopLevelTest/05: Fail, OK # Negative language test.
 StringInterpolation7NegativeTest: Fail, OK # Negative language test.
+Switch3NegativeTest: Fail, OK # Negative language test.
+Switch7NegativeTest: Fail, OK # Negative language test.
 Throw7NegativeTest: Fail, OK # Negative language test.
 TryCatchSyntaxTest/08: Fail, OK # Negative language test.
 TypeVariableBoundsTest/00: Fail, OK # Negative language test.