Use ErrorStream everywhere

Eliminates one more usage of FormatString and its static initializer.

Add more ErrorStream types
and replace gl::Error and egl::Error with them.

BUG=angleproject:1644

Change-Id: Ib498d0ae4b81a332ec71aed7cf709993b154e6bb
Reviewed-on: https://chromium-review.googlesource.com/505429
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/renderer/vulkan/ProgramVk.cpp b/src/libANGLE/renderer/vulkan/ProgramVk.cpp
index 5a76acf..823f80a 100644
--- a/src/libANGLE/renderer/vulkan/ProgramVk.cpp
+++ b/src/libANGLE/renderer/vulkan/ProgramVk.cpp
@@ -40,13 +40,13 @@
                            gl::BinaryInputStream *stream)
 {
     UNIMPLEMENTED();
-    return gl::Error(GL_INVALID_OPERATION);
+    return gl::InternalError();
 }
 
 gl::Error ProgramVk::save(gl::BinaryOutputStream *stream)
 {
     UNIMPLEMENTED();
-    return gl::Error(GL_INVALID_OPERATION);
+    return gl::InternalError();
 }
 
 void ProgramVk::setBinaryRetrievableHint(bool retrievable)