Replace SmartPointer<T> with unique_ptr<T>

src/compiler/code-assembler.h

Index: src/compiler/code-assembler.h
diff --git a/src/compiler/code-assembler.h b/src/compiler/code-assembler.h
index fd54bcbb4f52981b3ab15b9c829481c35e50311b..c9f5409ca8a5cf27489b390db06b2f3df5beb534 100644
--- a/src/compiler/code-assembler.h
+++ b/src/compiler/code-assembler.h
@@ -6,6 +6,7 @@
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
+#include <memory>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
@@ -410,7 +411,7 @@ class CodeAssembler {
   Node* CallN(CallDescriptor* descriptor, Node* code_target, Node** args);
   Node* TailCallN(CallDescriptor* descriptor, Node* code_target, Node** args);
 
-  base::SmartPointer<RawMachineAssembler> raw_assembler_;
+  std::unique_ptr<RawMachineAssembler> raw_assembler_;
   Code::Flags flags_;
   const char* name_;
   bool code_generated_;