PPC: Make FlushICache part of Assembler(Base) and take Isolate as parameter.

src/ppc/codegen-ppc.cc

Index: src/ppc/codegen-ppc.cc
diff --git a/src/ppc/codegen-ppc.cc b/src/ppc/codegen-ppc.cc
index 3032da8b19c1a8301cb6a2aeb4db2d8dd4f3e9a4..b313d11bb319c359b8dbb30d0fd2f0992952c9d3 100644
--- a/src/ppc/codegen-ppc.cc
+++ b/src/ppc/codegen-ppc.cc
@@ -62,7 +62,7 @@ UnaryMathFunction CreateExpFunction() {
   DCHECK(!RelocInfo::RequiresRelocation(desc));
 #endif
 
-  CpuFeatures::FlushICache(buffer, actual_size);
+  Assembler::FlushICacheWithoutIsolate(buffer, actual_size);
   base::OS::ProtectCode(buffer, actual_size);
 
 #if !defined(USE_SIMULATOR)
@@ -99,7 +99,7 @@ UnaryMathFunction CreateSqrtFunction() {
   DCHECK(!RelocInfo::RequiresRelocation(desc));
 #endif
 
-  CpuFeatures::FlushICache(buffer, actual_size);
+  Assembler::FlushICacheWithoutIsolate(buffer, actual_size);
   base::OS::ProtectCode(buffer, actual_size);
   return FUNCTION_CAST<UnaryMathFunction>(buffer);
 #endif
@@ -660,7 +660,7 @@ void Code::PatchPlatformCodeAge(Isolate* isolate, byte* sequence, Code::Age age,
   uint32_t young_length = isolate->code_aging_helper()->young_sequence_length();
   if (age == kNoAgeCodeAge) {
     isolate->code_aging_helper()->CopyYoungSequenceTo(sequence);
-    CpuFeatures::FlushICache(sequence, young_length);
+    Assembler::FlushICache(isolate, sequence, young_length);
   } else {
     // FIXED_SEQUENCE
     Code* stub = GetCodeAgeStub(isolate, age, parity);