Pass zone explicitly to zone-allocation on x64 and ARM.

This is a very mechanical change to reduce the number of calls to
Isolate::Current that come with every plain new-allocation.

BUG=v8:1802
Review URL: https://chromiumcodereview.appspot.com/9491004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10857 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-arm.h

@@ -2200,6 +2200,7 @@ class LChunkBuilder BASE_EMBEDDED {
       : chunk_(NULL),
         info_(info),
         graph_(graph),
+        zone_(graph->isolate()->zone()),
         status_(UNUSED),
         current_instruction_(NULL),
         current_block_(NULL),
@@ -2229,6 +2230,7 @@ class LChunkBuilder BASE_EMBEDDED {
   LChunk* chunk() const { return chunk_; }
   CompilationInfo* info() const { return info_; }
   HGraph* graph() const { return graph_; }
+  Zone* zone() const { return zone_; }
 
   bool is_unused() const { return status_ == UNUSED; }
   bool is_building() const { return status_ == BUILDING; }
@@ -2333,6 +2335,7 @@ class LChunkBuilder BASE_EMBEDDED {
   LChunk* chunk_;
   CompilationInfo* info_;
   HGraph* const graph_;
+  Zone* zone_;
   Status status_;
   HInstruction* current_instruction_;
   HBasicBlock* current_block_;

src/ia32/lithium-ia32.h

@@ -2321,7 +2321,7 @@ class LChunkBuilder BASE_EMBEDDED {
       : chunk_(NULL),
         info_(info),
         graph_(graph),
-        isolate_(graph->isolate()),
+        zone_(graph->isolate()->zone()),
         status_(UNUSED),
         current_instruction_(NULL),
         current_block_(NULL),
@@ -2351,7 +2351,7 @@ class LChunkBuilder BASE_EMBEDDED {
   LChunk* chunk() const { return chunk_; }
   CompilationInfo* info() const { return info_; }
   HGraph* graph() const { return graph_; }
-  Zone* zone() { return isolate_->zone(); }
+  Zone* zone() { return zone_; }
 
   bool is_unused() const { return status_ == UNUSED; }
   bool is_building() const { return status_ == BUILDING; }
@@ -2460,7 +2460,7 @@ class LChunkBuilder BASE_EMBEDDED {
   LChunk* chunk_;
   CompilationInfo* info_;
   HGraph* const graph_;
-  Isolate* isolate_;
+  Zone* zone_;
   Status status_;
   HInstruction* current_instruction_;
   HBasicBlock* current_block_;

src/x64/lithium-x64.h

@@ -2181,6 +2181,7 @@ class LChunkBuilder BASE_EMBEDDED {
       : chunk_(NULL),
         info_(info),
         graph_(graph),
+        zone_(graph->isolate()->zone()),
         status_(UNUSED),
         current_instruction_(NULL),
         current_block_(NULL),
@@ -2210,6 +2211,7 @@ class LChunkBuilder BASE_EMBEDDED {
   LChunk* chunk() const { return chunk_; }
   CompilationInfo* info() const { return info_; }
   HGraph* graph() const { return graph_; }
+  Zone* zone() const { return zone_; }
 
   bool is_unused() const { return status_ == UNUSED; }
   bool is_building() const { return status_ == BUILDING; }
@@ -2318,6 +2320,7 @@ class LChunkBuilder BASE_EMBEDDED {
   LChunk* chunk_;
   CompilationInfo* info_;
   HGraph* const graph_;
+  Zone* zone_;
   Status status_;
   HInstruction* current_instruction_;
   HBasicBlock* current_block_;