One Zone per CompilationInfo.

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index 99e7ec82497fa76353ad2bc5b66bf7b8b48d2323..d7fe26b3aa4818629e930f4fcd281b9b47b6618a 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -45,26 +45,25 @@ class SafepointGenerator;
 
 class LCodeGen BASE_EMBEDDED {
  public:
-  LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info,
-           Zone* zone)
-      : chunk_(chunk),
+  LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info)
+      : zone_(info->zone()),
+        chunk_(chunk),
         masm_(assembler),
         info_(info),
         current_block_(-1),
         current_instruction_(-1),
         instructions_(chunk->instructions()),
-        deoptimizations_(4, zone),
-        jump_table_(4, zone),
-        deoptimization_literals_(8, zone),
+        deoptimizations_(4, info->zone()),
+        jump_table_(4, info->zone()),
+        deoptimization_literals_(8, info->zone()),
         inlined_function_count_(0),
         scope_(info->scope()),
         status_(UNUSED),
-        translations_(zone),
-        deferred_(8, zone),
+        translations_(info->zone()),
+        deferred_(8, info->zone()),
         osr_pc_offset_(-1),
         last_lazy_deopt_pc_(0),
-        safepoints_(zone),
-        zone_(zone),
+        safepoints_(info->zone()),
         resolver_(this),
         expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
@@ -325,6 +324,7 @@ class LCodeGen BASE_EMBEDDED {
 
   void EnsureSpaceForLazyDeopt(int space_needed);
 
+  Zone* zone_;
   LChunk* const chunk_;
   MacroAssembler* const masm_;
   CompilationInfo* const info_;
@@ -347,8 +347,6 @@ class LCodeGen BASE_EMBEDDED {
   // itself is emitted at the end of the generated code.
   SafepointTableBuilder safepoints_;
 
-  Zone* zone_;
-
   // Compiler from a set of parallel moves to a sequential list of moves.
   LGapResolver resolver_;