Rename objMap to mapObject

mapObject fits better with other module names ("flattenChildren", "traverseAllChildren" etc.) and highlights that it only works with objects - which is going to be more important once we'll have an ES6 Map polyfill.

src/core/ReactCompositeComponent.js

@@ -35,7 +35,7 @@ var keyMirror = require('keyMirror');
 var merge = require('merge');
 var mixInto = require('mixInto');
 var monitorCodeUse = require('monitorCodeUse');
-var objMap = require('objMap');
+var mapObject = require('mapObject');
 var shouldUpdateReactComponent = require('shouldUpdateReactComponent');
 var warning = require('warning');
 
@@ -542,7 +542,7 @@ function mergeObjectsWithNoDuplicateKeys(one, two) {
     'mergeObjectsWithNoDuplicateKeys(): Cannot merge non-objects'
   );
 
-  objMap(two, function(value, key) {
+  mapObject(two, function(value, key) {
     invariant(
       one[key] === undefined,
       'mergeObjectsWithNoDuplicateKeys(): ' +

src/vendor/core/mapObject.js

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
- * @providesModule objMap
+ * @providesModule mapObject
  */
 
 "use strict";
@@ -25,12 +25,17 @@
  *
  *   func(value, key, iteration)
  *
+ * Grepable names:
+ *
+ *   function objectMap()
+ *   function objMap()
+ *
  * @param {?object} obj Object to map keys over
  * @param {function} func Invoked for each key/val pair.
  * @param {?*} context
  * @return {?object} Result of mapping or null if obj is falsey
  */
-function objMap(obj, func, context) {
+function mapObject(obj, func, context) {
   if (!obj) {
     return null;
   }
@@ -44,4 +49,4 @@ function objMap(obj, func, context) {
   return ret;
 }
 
-module.exports = objMap;
+module.exports = mapObject;