Partial fix for V8 issue 1079.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 319579165410dcd5c2e6f8379a26f4e0a30e1de1..abeb2a360d2bbcf7899257a04e7666c52f23f96a 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -1847,7 +1847,7 @@ class LChunkBuilder BASE_EMBEDDED {
         argument_count_(0),
         allocator_(allocator),
         position_(RelocInfo::kNoPosition),
-        instructions_pending_deoptimization_environment_(NULL),
+        instruction_pending_deoptimization_environment_(NULL),
         pending_deoptimization_ast_id_(AstNode::kNoNumber) { }
 
   // Build the sequence for the graph.
@@ -1981,7 +1981,7 @@ class LChunkBuilder BASE_EMBEDDED {
   int argument_count_;
   LAllocator* allocator_;
   int position_;
-  LInstruction* instructions_pending_deoptimization_environment_;
+  LInstruction* instruction_pending_deoptimization_environment_;
   int pending_deoptimization_ast_id_;
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);