Rename Workarounds to WorkaroundsD3D.

It is not referenced outside of the d3d classes.

BUG=angleproject:884

Change-Id: Ibeec034b1b78b569bea2f1c77d6a686b58b8e010
Reviewed-on: https://chromium-review.googlesource.com/288582
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/renderer/d3d/FramebufferD3D.cpp b/src/libANGLE/renderer/d3d/FramebufferD3D.cpp
index f48351f..b5cc1be 100644
--- a/src/libANGLE/renderer/d3d/FramebufferD3D.cpp
+++ b/src/libANGLE/renderer/d3d/FramebufferD3D.cpp
@@ -337,7 +337,8 @@
     return GL_FRAMEBUFFER_COMPLETE;
 }
 
-const gl::AttachmentList &FramebufferD3D::getColorAttachmentsForRender(const Workarounds &workarounds) const
+const gl::AttachmentList &FramebufferD3D::getColorAttachmentsForRender(
+    const WorkaroundsD3D &workarounds) const
 {
     if (!mInvalidateColorAttachmentCache)
     {