Fix lots of variable shadowing in ANGLE

BUG=angle:877

Change-Id: I3df0fffb19f5ecbe439fbc2a8d6d239a5dc6b638
Reviewed-on: https://chromium-review.googlesource.com/243334
Tested-by: Austin Kinross <aukinros@microsoft.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/renderer/d3d/VertexDataManager.cpp b/src/libANGLE/renderer/d3d/VertexDataManager.cpp
index d0848ce..eade346 100644
--- a/src/libANGLE/renderer/d3d/VertexDataManager.cpp
+++ b/src/libANGLE/renderer/d3d/VertexDataManager.cpp
@@ -305,8 +305,8 @@
             int totalCount = ElementsInBuffer(attrib, storage->getSize());
             int startIndex = attrib.offset / ComputeVertexAttributeStride(attrib);
 
-            gl::Error error = staticBuffer->storeVertexAttributes(attrib, currentValue, -startIndex, totalCount,
-                                                                  0, &streamOffset);
+            error = staticBuffer->storeVertexAttributes(attrib, currentValue, -startIndex, totalCount,
+                                                        0, &streamOffset);
             if (error.isError())
             {
                 return error;