Move platform abstraction to base library

src/x64/assembler-x64-inl.h

Index: src/x64/assembler-x64-inl.h
diff --git a/src/x64/assembler-x64-inl.h b/src/x64/assembler-x64-inl.h
index f1731af34b6b05b9531755e490771420ef2e1f66..0006481996e3ac3781790cd4b49ae40c6e64790f 100644
--- a/src/x64/assembler-x64-inl.h
+++ b/src/x64/assembler-x64-inl.h
@@ -7,7 +7,7 @@
 
 #include "src/x64/assembler-x64.h"
 
-#include "src/cpu.h"
+#include "src/base/cpu.h"
 #include "src/debug.h"
 #include "src/v8memory.h"
 
@@ -196,7 +196,7 @@ void Assembler::set_target_address_at(Address pc,
                                       ICacheFlushMode icache_flush_mode) {
   Memory::int32_at(pc) = static_cast<int32_t>(target - pc - 4);
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
-    CPU::FlushICache(pc, sizeof(int32_t));
+    CpuFeatures::FlushICache(pc, sizeof(int32_t));
   }
 }
 
@@ -224,15 +224,15 @@ void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) {
   if (IsInternalReference(rmode_)) {
     // absolute code pointer inside code object moves with the code object.
     Memory::Address_at(pc_) += static_cast<int32_t>(delta);
-    if (flush_icache) CPU::FlushICache(pc_, sizeof(Address));
+    if (flush_icache) CpuFeatures::FlushICache(pc_, sizeof(Address));
   } else if (IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)) {
     Memory::int32_at(pc_) -= static_cast<int32_t>(delta);
-    if (flush_icache) CPU::FlushICache(pc_, sizeof(int32_t));
+    if (flush_icache) CpuFeatures::FlushICache(pc_, sizeof(int32_t));
   } else if (rmode_ == CODE_AGE_SEQUENCE) {
     if (*pc_ == kCallOpcode) {
       int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1);
       *p -= static_cast<int32_t>(delta);  // Relocate entry.
-      if (flush_icache) CPU::FlushICache(p, sizeof(uint32_t));
+      if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t));
     }
   }
 }
@@ -310,7 +310,7 @@ void RelocInfo::set_target_object(Object* target,
   ASSERT(!target->IsConsString());
   Memory::Object_at(pc_) = target;
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
-    CPU::FlushICache(pc_, sizeof(Address));
+    CpuFeatures::FlushICache(pc_, sizeof(Address));
   }
   if (write_barrier_mode == UPDATE_WRITE_BARRIER &&
       host() != NULL &&
@@ -357,7 +357,7 @@ void RelocInfo::set_target_cell(Cell* cell,
   Address address = cell->address() + Cell::kValueOffset;
   Memory::Address_at(pc_) = address;
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
-    CPU::FlushICache(pc_, sizeof(Address));
+    CpuFeatures::FlushICache(pc_, sizeof(Address));
   }
   if (write_barrier_mode == UPDATE_WRITE_BARRIER &&
       host() != NULL) {
@@ -435,8 +435,8 @@ void RelocInfo::set_call_address(Address target) {
          (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
   Memory::Address_at(pc_ + Assembler::kRealPatchReturnSequenceAddressOffset) =
       target;
-  CPU::FlushICache(pc_ + Assembler::kRealPatchReturnSequenceAddressOffset,
-                   sizeof(Address));
+  CpuFeatures::FlushICache(
+      pc_ + Assembler::kRealPatchReturnSequenceAddressOffset, sizeof(Address));
   if (host() != NULL) {
     Object* target_code = Code::GetCodeFromTargetAddress(target);
     host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
@@ -467,14 +467,14 @@ void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
   RelocInfo::Mode mode = rmode();
   if (mode == RelocInfo::EMBEDDED_OBJECT) {
     visitor->VisitEmbeddedPointer(this);
-    CPU::FlushICache(pc_, sizeof(Address));
+    CpuFeatures::FlushICache(pc_, sizeof(Address));
   } else if (RelocInfo::IsCodeTarget(mode)) {
     visitor->VisitCodeTarget(this);
   } else if (mode == RelocInfo::CELL) {
     visitor->VisitCell(this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
-    CPU::FlushICache(pc_, sizeof(Address));
+    CpuFeatures::FlushICache(pc_, sizeof(Address));
   } else if (RelocInfo::IsCodeAgeSequence(mode)) {
     visitor->VisitCodeAgeSequence(this);
   } else if (((RelocInfo::IsJSReturn(mode) &&
@@ -494,14 +494,14 @@ void RelocInfo::Visit(Heap* heap) {
   RelocInfo::Mode mode = rmode();
   if (mode == RelocInfo::EMBEDDED_OBJECT) {
     StaticVisitor::VisitEmbeddedPointer(heap, this);
-    CPU::FlushICache(pc_, sizeof(Address));
+    CpuFeatures::FlushICache(pc_, sizeof(Address));
   } else if (RelocInfo::IsCodeTarget(mode)) {
     StaticVisitor::VisitCodeTarget(heap, this);
   } else if (mode == RelocInfo::CELL) {
     StaticVisitor::VisitCell(heap, this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     StaticVisitor::VisitExternalReference(this);
-    CPU::FlushICache(pc_, sizeof(Address));
+    CpuFeatures::FlushICache(pc_, sizeof(Address));
   } else if (RelocInfo::IsCodeAgeSequence(mode)) {
     StaticVisitor::VisitCodeAgeSequence(heap, this);
   } else if (heap->isolate()->debug()->has_break_points() &&