Rename "color" functions to "pixel" functions.

This extends of the copy, read and write functions to cover depth and
stencil formats.

Refactoring change only.

Bug: angleproject:2673
Change-Id: I4b0b2f4cf8621051cacd95cdbd6d70f94ca612e2
Reviewed-on: https://chromium-review.googlesource.com/1147152
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/renderer/vulkan/TextureVk.cpp b/src/libANGLE/renderer/vulkan/TextureVk.cpp
index 91658e2..f9fc8d0 100644
--- a/src/libANGLE/renderer/vulkan/TextureVk.cpp
+++ b/src/libANGLE/renderer/vulkan/TextureVk.cpp
@@ -669,8 +669,8 @@
     GLuint destDataRowPitch   = sourceArea.width * destAngleFormat.pixelBytes;
 
     CopyImageCHROMIUM(sourceData, sourceDataRowPitch, sourceAngleFormat.pixelBytes,
-                      sourceAngleFormat.colorReadFunction, destData, destDataRowPitch,
-                      destAngleFormat.pixelBytes, destAngleFormat.colorWriteFunction,
+                      sourceAngleFormat.pixelReadFunction, destData, destDataRowPitch,
+                      destAngleFormat.pixelBytes, destAngleFormat.pixelWriteFunction,
                       destFormat.format, destFormat.componentType, sourceArea.width,
                       sourceArea.height, unpackFlipY, unpackPremultiplyAlpha,
                       unpackUnmultiplyAlpha);