Record AST ids in relocation info at spots where we collect dynamic type feedback.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index fd8e8b5d54ca444e3d81d23a62a0cc823c8394dd..fa97a3b3217ce506ccd8a070a831e82a47d606ae 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -315,6 +315,7 @@ Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
   no_const_pool_before_ = 0;
   last_const_pool_end_ = 0;
   last_bound_pos_ = 0;
+  ast_id_for_reloc_info_ = kNoASTId;
 }
 
 
@@ -2722,7 +2723,14 @@ void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) {
       }
     }
     ASSERT(buffer_space() >= kMaxRelocSize);  // too late to grow buffer here
-    reloc_info_writer.Write(&rinfo);
+    if (rmode == RelocInfo::CODE_TARGET_WITH_ID) {
+      ASSERT(ast_id_for_reloc_info_ != kNoASTId);
+      RelocInfo reloc_info_with_ast_id(pc_, rmode, ast_id_for_reloc_info_);
+      ast_id_for_reloc_info_ = kNoASTId;
+      reloc_info_writer.Write(&reloc_info_with_ast_id);
+    } else {
+      reloc_info_writer.Write(&rinfo);
+    }
   }
 }