Refactor ExternalReference::isolate_address() to not rely on Isolate::Current().

src/x64/regexp-macro-assembler-x64.cc

Index: src/x64/regexp-macro-assembler-x64.cc
diff --git a/src/x64/regexp-macro-assembler-x64.cc b/src/x64/regexp-macro-assembler-x64.cc
index 914241ecdc42eabb9d3a50edbf92e0d6a13a63cb..e5ef64aedd6e456761d9d0859c0e98b4050f9c6e 100644
--- a/src/x64/regexp-macro-assembler-x64.cc
+++ b/src/x64/regexp-macro-assembler-x64.cc
@@ -437,7 +437,7 @@ void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
     // Set byte_length.
     __ movq(r8, rbx);
     // Isolate.
-    __ LoadAddress(r9, ExternalReference::isolate_address());
+    __ LoadAddress(r9, ExternalReference::isolate_address(masm_.isolate()));
 #else  // AMD64 calling convention
     // Compute byte_offset2 (current position = rsi+rdi).
     __ lea(rax, Operand(rsi, rdi, times_1, 0));
@@ -448,7 +448,7 @@ void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
     // Set byte_length.
     __ movq(rdx, rbx);
     // Isolate.
-    __ LoadAddress(rcx, ExternalReference::isolate_address());
+    __ LoadAddress(rcx, ExternalReference::isolate_address(masm_.isolate()));
 #endif
 
     { // NOLINT: Can't find a way to open this scope without confusing the
@@ -1055,12 +1055,12 @@ Handle<HeapObject> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
     // Microsoft passes parameters in rcx, rdx, r8.
     // First argument, backtrack stackpointer, is already in rcx.
     __ lea(rdx, Operand(rbp, kStackHighEnd));  // Second argument
-    __ LoadAddress(r8, ExternalReference::isolate_address());
+    __ LoadAddress(r8, ExternalReference::isolate_address(masm_.isolate()));
 #else
     // AMD64 ABI passes parameters in rdi, rsi, rdx.
     __ movq(rdi, backtrack_stackpointer());   // First argument.
     __ lea(rsi, Operand(rbp, kStackHighEnd));  // Second argument.
-    __ LoadAddress(rdx, ExternalReference::isolate_address());
+    __ LoadAddress(rdx, ExternalReference::isolate_address(masm_.isolate()));
 #endif
     ExternalReference grow_stack =
         ExternalReference::re_grow_stack(masm_.isolate());