Remove the ES version check for buffer to texture copies in D3D11.

With PBOs being exposed through an extension in ES2 now, this check is
uneccessary.

Change-Id: I609a4bcd944194d104e0774e5f6ea34e072c8d9c
Reviewed-on: https://chromium-review.googlesource.com/201320
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libGLESv2/renderer/d3d11/Renderer11.cpp b/src/libGLESv2/renderer/d3d11/Renderer11.cpp
index 68f3d40..afdaa68 100644
--- a/src/libGLESv2/renderer/d3d11/Renderer11.cpp
+++ b/src/libGLESv2/renderer/d3d11/Renderer11.cpp
@@ -2804,13 +2804,9 @@
 
 bool Renderer11::supportsFastCopyBufferToTexture(GLenum internalFormat) const
 {
-    int clientVersion = getCurrentClientVersion();
+    ASSERT(getCaps().extensions.pixelBufferObject);
 
-    // We only support buffer to texture copies in ES3
-    if (clientVersion <= 2)
-    {
-        return false;
-    }
+    GLuint clientVersion = getCurrentClientVersion();
 
     // sRGB formats do not work with D3D11 buffer SRVs
     if (gl::GetColorEncoding(internalFormat, clientVersion) == GL_SRGB)