Cleaned up namespace handling.

A Namespace object is now guaranteed unique.
This cleaned up some old workarounds and latent bugs.

Change-Id: Ic3f12d89947871b03b2c449ba51b3186f953adde
Tested: on Linux.
Bug: 21336857

tests/MyGame/InParentNamespace.php

@@ -0,0 +1,79 @@
+<?php
+// automatically generated by the FlatBuffers compiler, do not modify
+
+namespace MyGame;
+
+use \Google\FlatBuffers\Struct;
+use \Google\FlatBuffers\Table;
+use \Google\FlatBuffers\ByteBuffer;
+use \Google\FlatBuffers\FlatBufferBuilder;
+
+class InParentNamespace extends Table
+{
+    /**
+     * @param ByteBuffer $bb
+     * @return InParentNamespace
+     */
+    public static function getRootAsInParentNamespace(ByteBuffer $bb)
+    {
+        $obj = new InParentNamespace();
+        return ($obj->init($bb->getInt($bb->getPosition()) + $bb->getPosition(), $bb));
+    }
+
+    public static function InParentNamespaceIdentifier()
+    {
+        return "MONS";
+    }
+
+    public static function InParentNamespaceBufferHasIdentifier(ByteBuffer $buf)
+    {
+        return self::__has_identifier($buf, self::InParentNamespaceIdentifier());
+    }
+
+    public static function InParentNamespaceExtension()
+    {
+        return "mon";
+    }
+
+    /**
+     * @param int $_i offset
+     * @param ByteBuffer $_bb
+     * @return InParentNamespace
+     **/
+    public function init($_i, ByteBuffer $_bb)
+    {
+        $this->bb_pos = $_i;
+        $this->bb = $_bb;
+        return $this;
+    }
+
+    /**
+     * @param FlatBufferBuilder $builder
+     * @return void
+     */
+    public static function startInParentNamespace(FlatBufferBuilder $builder)
+    {
+        $builder->StartObject(0);
+    }
+
+    /**
+     * @param FlatBufferBuilder $builder
+     * @return InParentNamespace
+     */
+    public static function createInParentNamespace(FlatBufferBuilder $builder, )
+    {
+        $builder->startObject(0);
+        $o = $builder->endObject();
+        return $o;
+    }
+
+    /**
+     * @param FlatBufferBuilder $builder
+     * @return int table offset
+     */
+    public static function endInParentNamespace(FlatBufferBuilder $builder)
+    {
+        $o = $builder->endObject();
+        return $o;
+    }
+}