GL_ANGLE_multiview has been renamed to GL_OVR_multiview2.

changes include:
1) GL_OVR_multiview to GL_OVR_multiview2 extension directive change
2) Removal of all references to side by side. We no longer support multiple views in a single 2DTexture. Only 2DTextureArray's are supported
3) WebGL 2 (ES3) is required for multiview

Bug: angleproject:3341
Change-Id: Ie0c1d21d7610f8feebdb2e4d01c6947f57e69328
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1552023
Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/validationES2.cpp b/src/libANGLE/validationES2.cpp
index 29505a4..b65a1ba 100644
--- a/src/libANGLE/validationES2.cpp
+++ b/src/libANGLE/validationES2.cpp
@@ -2689,7 +2689,7 @@
         }
     }
 
-    if (extensions.multiview && extensions.disjointTimerQuery)
+    if (extensions.multiview2 && extensions.disjointTimerQuery)
     {
         const State &state       = context->getState();
         Framebuffer *framebuffer = state.getDrawFramebuffer();