Make more JS files beter match the coding standard.

test/mjsunit/compiler/null-compare.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 function IsNull(x) {
-  if (x == null) return true; else return false;
+  if (x == null) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 assertTrue(IsNull(null), "null == null");
 assertTrue(IsNull(void 0), "void 0 == null");
 assertFalse(IsNull(42), "42 != null");
 
 
 function IsNullStrict(x) {
-  if (x === null) return true; else return false;
+  if (x === null) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 assertTrue(IsNullStrict(null), "null === null");
 assertFalse(IsNullStrict(void 0), "void 0 != null");
 assertFalse(IsNullStrict(87), "87 !== null");
 
 
 function GimmeFalse(x) {
   if ((x & 1) == null) return true;
   if ((x | 3) === null) return true;
   return false;
 }
 
 assertFalse(GimmeFalse(1), "GimmeFalse(1)");
 assertFalse(GimmeFalse(null), "GimmeFalse(null)");
 assertFalse(GimmeFalse({}), "GimmeFalse({})");