Reland "Renamed SkSL "offset" to "line""

This reverts commit cc91452f0a65f261283615db9ed3d37b1c3acd15.

Change-Id: I7eff0ddeebef4ce298893f9b3ba410b09647e9a4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/453138
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/sksl/SkSLCompiler.cpp b/src/sksl/SkSLCompiler.cpp
index c0486d0..676e3f2 100644
--- a/src/sksl/SkSLCompiler.cpp
+++ b/src/sksl/SkSLCompiler.cpp
@@ -203,7 +203,7 @@
 
     // sk_Caps is "builtin", but all references to it are resolved to Settings, so we don't need to
     // treat it as builtin (ie, no need to clone it into the Program).
-    privateSymbolTable->add(std::make_unique<Variable>(/*offset=*/-1,
+    privateSymbolTable->add(std::make_unique<Variable>(/*line=*/-1,
                                                        fCoreModifiers.add(Modifiers{}),
                                                        "sk_Caps",
                                                        fContext->fTypes.fSkCaps.get(),