Return newValue from indexSet helper and other intercepted setters. Also, throw IllegalArgumentExce…

dart/tests/corelib/corelib-leg.status

Index: dart/tests/corelib/corelib-leg.status
diff --git a/dart/tests/corelib/corelib-leg.status b/dart/tests/corelib/corelib-leg.status
index 411626a068d3458ba2d31e1fba287f12ec3f76c8..7d9b7db157a19f5b6e9eb5ca739b4b4031ad5b56 100644
--- a/dart/tests/corelib/corelib-leg.status
+++ b/dart/tests/corelib/corelib-leg.status
@@ -9,6 +9,10 @@ prefix corelib
 
 
 [ $component == leg ]
+DoubleCompareTest: Fail, OK # VM handling of double literals.
+MathTest: Fail, OK # VM handling of double literals.
+
+
 # Compilation errors.
 CollectionFromTest: Fail # named constructors with type arguments are not implemented
 CoreRuntimeTypesTest: Fail # map not implemented
@@ -32,15 +36,12 @@ SplayTreeTest: Fail # SsaBuilder.visitBreakStatement not implemented
 StopwatchTest: Fail # visitBreakStatement not implemented
 StringTest: Fail # Internal Error: Cannot find value
 StringPatternTest: Fail # Bad bailout code related to for-in.
+ListGetRangeTest: Fail # Bad code for Expect.throws.
 
 
-# Implementation errors.
+# Constant lists.
 ConstListRemoveRangeTest: Fail # Expect.isTrue(false) fails.
 ConstListSetRangeTest: Fail # Expect.isTrue(false) fails.
-DoubleCompareTest: Fail # Expect.isTrue(false) fails.
-ExpressionTest: Fail # Expect.equals(expected: <2>, actual: <null>) fails.
-ListGetRangeTest: Fail # Expect.isTrue(false) fails.
-MathTest: Fail # Expect.equals(expected: <true>, actual: <false>) fails.
 
 
 # Bad test, assumes RegExp.allMatches returns a Collection.