Implement CHROMIUM_copy_texture for D3D11.

BUG=angleproject:1356

Change-Id: I70246762411dbeeb3e291e317854139a68d80070
Reviewed-on: https://chromium-review.googlesource.com/339434
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/renderer/TextureImpl.cpp b/src/libANGLE/renderer/TextureImpl.cpp
new file mode 100644
index 0000000..465d4e3
--- /dev/null
+++ b/src/libANGLE/renderer/TextureImpl.cpp
@@ -0,0 +1,43 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// TextureImpl.cpp: Defines the abstract rx::TextureImpl classes.
+
+#include "libANGLE/renderer/TextureImpl.h"
+
+namespace rx
+{
+
+TextureImpl::TextureImpl(const gl::TextureState &state) : mState(state)
+{
+}
+
+TextureImpl::~TextureImpl()
+{
+}
+
+gl::Error TextureImpl::copyTexture(GLenum internalFormat,
+                                   GLenum type,
+                                   bool unpackFlipY,
+                                   bool unpackPremultiplyAlpha,
+                                   bool unpackUnmultiplyAlpha,
+                                   const gl::Texture *source)
+{
+    UNREACHABLE();
+    return gl::Error(GL_INVALID_OPERATION, "CHROMIUM_copy_texture exposed but not implemented.");
+}
+
+gl::Error TextureImpl::copySubTexture(const gl::Offset &destOffset,
+                                      const gl::Rectangle &sourceArea,
+                                      bool unpackFlipY,
+                                      bool unpackPremultiplyAlpha,
+                                      bool unpackUnmultiplyAlpha,
+                                      const gl::Texture *source)
+{
+    UNREACHABLE();
+    return gl::Error(GL_INVALID_OPERATION, "CHROMIUM_copy_texture exposed but not implemented.");
+}
+}