Expose the ANGLE_instanced_arrays extension.

TRAC #19489
Signed-off-by: Daniel Koch
Author: Nicolas Capens

git-svn-id: https://angleproject.googlecode.com/svn/trunk@975 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/Context.cpp b/src/libGLESv2/Context.cpp
index 2783a44..ce215ee 100644
--- a/src/libGLESv2/Context.cpp
+++ b/src/libGLESv2/Context.cpp
@@ -3720,6 +3720,11 @@
         mExtensionString += "GL_ANGLE_framebuffer_multisample ";
     }
 
+    if (supportsShaderModel3())
+    {
+        mExtensionString += "GL_ANGLE_instanced_arrays ";
+    }
+
     mExtensionString += "GL_ANGLE_pack_reverse_row_order ";
 
     if (supportsDXT3Textures())