MIPS: remove most uses of Isolate::Current in arch specific files.

src/mips/ic-mips.cc

Index: src/mips/ic-mips.cc
diff --git a/src/mips/ic-mips.cc b/src/mips/ic-mips.cc
index 847dea0b5783dd1daa39911f73173ee9f440fa34..e250e0ee4a564f5636014f6e794570d7430aa03d 100644
--- a/src/mips/ic-mips.cc
+++ b/src/mips/ic-mips.cc
@@ -359,7 +359,7 @@ void CallICBase::GenerateMonomorphicCacheProbe(MacroAssembler* masm,
                                          extra_state,
                                          Code::NORMAL,
                                          argc);
-  Isolate::Current()->stub_cache()->GenerateProbe(
+  masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, a1, a2, a3, t0, t1, t2);
 
   // If the stub cache probing failed, the receiver might be a value.
@@ -395,7 +395,7 @@ void CallICBase::GenerateMonomorphicCacheProbe(MacroAssembler* masm,
 
   // Probe the stub cache for the value object.
   __ bind(&probe);
-  Isolate::Current()->stub_cache()->GenerateProbe(
+  masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, a1, a2, a3, t0, t1, t2);
 
   __ bind(&miss);
@@ -658,7 +658,7 @@ void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   Code::Flags flags = Code::ComputeFlags(
       Code::STUB, MONOMORPHIC, Code::kNoExtraICState,
       Code::NORMAL, Code::LOAD_IC);
-  Isolate::Current()->stub_cache()->GenerateProbe(
+  masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, a0, a2, a3, t0, t1, t2);
 
   // Cache miss: Jump to runtime.
@@ -1498,7 +1498,7 @@ void StoreIC::GenerateMegamorphic(MacroAssembler* masm,
   Code::Flags flags = Code::ComputeFlags(
       Code::STUB, MONOMORPHIC, strict_mode,
       Code::NORMAL, Code::STORE_IC);
-  Isolate::Current()->stub_cache()->GenerateProbe(
+  masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, a1, a2, a3, t0, t1, t2);
 
   // Cache miss: Jump to runtime.