Reland: change most cases of variable redeclaration from TypeError to SyntaxError.

test/mjsunit/es6/block-eval-var-over-let.js

Index: test/mjsunit/es6/block-eval-var-over-let.js
diff --git a/test/mjsunit/es6/block-eval-var-over-let.js b/test/mjsunit/es6/block-eval-var-over-let.js
index febc83fa41365d796892431d241458ce3df15df2..b68dbdd12ddafb138f9d8aebda1757154f2ac4ef 100644
--- a/test/mjsunit/es6/block-eval-var-over-let.js
+++ b/test/mjsunit/es6/block-eval-var-over-let.js
@@ -8,13 +8,13 @@
 assertThrows(function() {
   let x = 1;
   eval('var x');
-}, TypeError);
+}, SyntaxError);
 
 // If the eval is in its own block scope, throws
 assertThrows(function() {
   let y = 1;
   { eval('var y'); }
-}, TypeError);
+}, SyntaxError);
 
 // If the let is in its own block scope, with the eval, throws
 assertThrows(function() {
@@ -22,7 +22,7 @@ assertThrows(function() {
     let x = 1;
     eval('var x');
   }
-}, TypeError);
+}, SyntaxError);
 
 // Legal if the let is no longer visible
 assertDoesNotThrow(function() {
@@ -37,13 +37,13 @@ assertDoesNotThrow(function() {
 assertThrows(function() {
   const x = 1;
   eval('var x');
-}, TypeError);
+}, SyntaxError);
 
 // If the eval is in its own block scope, throws
 assertThrows(function() {
   const y = 1;
   { eval('var y'); }
-}, TypeError);
+}, SyntaxError);
 
 // If the const is in its own block scope, with the eval, throws
 assertThrows(function() {
@@ -51,7 +51,7 @@ assertThrows(function() {
     const x = 1;
     eval('var x');
   }
-}, TypeError);
+}, SyntaxError);
 
 // Legal if the const is no longer visible
 assertDoesNotThrow(function() {