Move platform abstraction to base library

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
diff --git a/src/arm/codegen-arm.cc b/src/arm/codegen-arm.cc
index aa297001dc0bbccc365e9645e8f20c2f1f5c7021..aba7fd4d9abc7d0e8d0181f8d08e70a448747379 100644
--- a/src/arm/codegen-arm.cc
+++ b/src/arm/codegen-arm.cc
@@ -29,7 +29,8 @@ double fast_exp_simulator(double x) {
 UnaryMathFunction CreateExpFunction() {
   if (!FLAG_fast_math) return &std::exp;
   size_t actual_size;
-  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  byte* buffer =
+      static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == NULL) return &std::exp;
   ExternalReference::InitializeMathExpData();
 
@@ -66,8 +67,8 @@ UnaryMathFunction CreateExpFunction() {
   masm.GetCode(&desc);
   ASSERT(!RelocInfo::RequiresRelocation(desc));
 
-  CPU::FlushICache(buffer, actual_size);
-  OS::ProtectCode(buffer, actual_size);
+  CpuFeatures::FlushICache(buffer, actual_size);
+  base::OS::ProtectCode(buffer, actual_size);
 
 #if !defined(USE_SIMULATOR)
   return FUNCTION_CAST<UnaryMathFunction>(buffer);
@@ -84,7 +85,8 @@ MemCopyUint8Function CreateMemCopyUint8Function(MemCopyUint8Function stub) {
 #else
   if (!CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) return stub;
   size_t actual_size;
-  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  byte* buffer =
+      static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == NULL) return stub;
 
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
@@ -225,8 +227,8 @@ MemCopyUint8Function CreateMemCopyUint8Function(MemCopyUint8Function stub) {
   masm.GetCode(&desc);
   ASSERT(!RelocInfo::RequiresRelocation(desc));
 
-  CPU::FlushICache(buffer, actual_size);
-  OS::ProtectCode(buffer, actual_size);
+  CpuFeatures::FlushICache(buffer, actual_size);
+  base::OS::ProtectCode(buffer, actual_size);
   return FUNCTION_CAST<MemCopyUint8Function>(buffer);
 #endif
 }
@@ -240,7 +242,8 @@ MemCopyUint16Uint8Function CreateMemCopyUint16Uint8Function(
 #else
   if (!CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) return stub;
   size_t actual_size;
-  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  byte* buffer =
+      static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == NULL) return stub;
 
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
@@ -311,8 +314,8 @@ MemCopyUint16Uint8Function CreateMemCopyUint16Uint8Function(
   CodeDesc desc;
   masm.GetCode(&desc);
 
-  CPU::FlushICache(buffer, actual_size);
-  OS::ProtectCode(buffer, actual_size);
+  CpuFeatures::FlushICache(buffer, actual_size);
+  base::OS::ProtectCode(buffer, actual_size);
 
   return FUNCTION_CAST<MemCopyUint16Uint8Function>(buffer);
 #endif
@@ -324,7 +327,8 @@ UnaryMathFunction CreateSqrtFunction() {
   return &std::sqrt;
 #else
   size_t actual_size;
-  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  byte* buffer =
+      static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == NULL) return &std::sqrt;
 
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
@@ -338,8 +342,8 @@ UnaryMathFunction CreateSqrtFunction() {
   masm.GetCode(&desc);
   ASSERT(!RelocInfo::RequiresRelocation(desc));
 
-  CPU::FlushICache(buffer, actual_size);
-  OS::ProtectCode(buffer, actual_size);
+  CpuFeatures::FlushICache(buffer, actual_size);
+  base::OS::ProtectCode(buffer, actual_size);
   return FUNCTION_CAST<UnaryMathFunction>(buffer);
 #endif
 }
@@ -874,7 +878,7 @@ void Code::PatchPlatformCodeAge(Isolate* isolate,
   uint32_t young_length = isolate->code_aging_helper()->young_sequence_length();
   if (age == kNoAgeCodeAge) {
     isolate->code_aging_helper()->CopyYoungSequenceTo(sequence);
-    CPU::FlushICache(sequence, young_length);
+    CpuFeatures::FlushICache(sequence, young_length);
   } else {
     Code* stub = GetCodeAgeStub(isolate, age, parity);
     CodePatcher patcher(sequence, young_length / Assembler::kInstrSize);