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

src/ia32/deoptimizer-ia32.cc

Index: src/ia32/deoptimizer-ia32.cc
diff --git a/src/ia32/deoptimizer-ia32.cc b/src/ia32/deoptimizer-ia32.cc
index f0436225c51b033150300df9a432717ed7b01ac5..f8aff48d13070d89b1656f7db0231627d59551a0 100644
--- a/src/ia32/deoptimizer-ia32.cc
+++ b/src/ia32/deoptimizer-ia32.cc
@@ -716,8 +716,6 @@ void Deoptimizer::CopyDoubleRegisters(FrameDescription* output_frame) {
 void Deoptimizer::EntryGenerator::Generate() {
   GeneratePrologue();
 
-  Isolate* isolate = masm()->isolate();
-
   // Save all general purpose registers before messing with them.
   const int kNumberOfRegisters = Register::kNumRegisters;
 
@@ -762,10 +760,10 @@ void Deoptimizer::EntryGenerator::Generate() {
   __ mov(Operand(esp, 3 * kPointerSize), ecx);  // Code address or 0.
   __ mov(Operand(esp, 4 * kPointerSize), edx);  // Fp-to-sp delta.
   __ mov(Operand(esp, 5 * kPointerSize),
-         Immediate(ExternalReference::isolate_address()));
+         Immediate(ExternalReference::isolate_address(isolate())));
   {
     AllowExternalCallThatCantCauseGC scope(masm());
-    __ CallCFunction(ExternalReference::new_deoptimizer_function(isolate), 6);
+    __ CallCFunction(ExternalReference::new_deoptimizer_function(isolate()), 6);
   }
 
   // Preserve deoptimizer object in register eax and get the input
@@ -828,7 +826,7 @@ void Deoptimizer::EntryGenerator::Generate() {
   {
     AllowExternalCallThatCantCauseGC scope(masm());
     __ CallCFunction(
-        ExternalReference::compute_output_frames_function(isolate), 1);
+        ExternalReference::compute_output_frames_function(isolate()), 1);
   }
   __ pop(eax);