Use accessors to refer to the ModifiersPool.

This is a first step towards moving the ModifiersPool out of the
IRGenerator and into the Context.

Change-Id: I8000923f32a9e3cc1878a09464680884b950e513
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/404216
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/sksl/SkSLRehydrator.cpp b/src/sksl/SkSLRehydrator.cpp
index 46adfc7..44fba39 100644
--- a/src/sksl/SkSLRehydrator.cpp
+++ b/src/sksl/SkSLRehydrator.cpp
@@ -78,11 +78,10 @@
 };
 
 Rehydrator::Rehydrator(const Context* context, ModifiersPool* modifiers,
-                       std::shared_ptr<SymbolTable> symbolTable, ErrorReporter* errorReporter,
+                       std::shared_ptr<SymbolTable> symbolTable,
                        const uint8_t* src, size_t length)
                 : fContext(*context)
                 , fModifiers(*modifiers)
-                , fErrors(errorReporter)
                 , fSymbolTable(std::move(symbolTable))
                 , fStart(src)
     SkDEBUGCODE(, fEnd(fStart + length)) {
@@ -184,8 +183,12 @@
             const Type* returnType = this->type();
             const FunctionDeclaration* result =
                     fSymbolTable->takeOwnershipOfSymbol(std::make_unique<FunctionDeclaration>(
-                                              /*offset=*/-1, fModifiers.addToPool(modifiers), name,
-                                              std::move(parameters), returnType, /*builtin=*/true));
+                            /*offset=*/-1,
+                            this->modifiersPool().add(modifiers),
+                            name,
+                            std::move(parameters),
+                            returnType,
+                            /*builtin=*/true));
             this->addSymbol(id, result);
             return result;
         }
@@ -252,7 +255,7 @@
         }
         case kVariable_Command: {
             uint16_t id = this->readU16();
-            const Modifiers* m = fModifiers.addToPool(this->modifiers());
+            const Modifiers* m = this->modifiersPool().add(this->modifiers());
             StringFragment name = this->readString();
             const Type* type = this->type();
             Variable::Storage storage = (Variable::Storage) this->readU8();
@@ -585,7 +588,7 @@
     std::shared_ptr<SymbolTable> oldTable = fSymbolTable;
     std::shared_ptr<SymbolTable> result =
             inherit ? std::make_shared<SymbolTable>(fSymbolTable, /*builtin=*/true)
-                    : std::make_shared<SymbolTable>(fErrors, /*builtin=*/true);
+                    : std::make_shared<SymbolTable>(this->errorReporter(), /*builtin=*/true);
     fSymbolTable = result;
     std::vector<const Symbol*> ownedSymbols;
     ownedSymbols.reserve(ownedCount);