Less aggressive polling when concurrently compiling for OSR.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 8ceb61db9ce3e6e05324f715097858e20ffc8767..d8c3f73f607a1eb9a3249e5431ea6376b33ead7b 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -86,6 +86,7 @@ class CompilationInfo {
   ScriptDataImpl* pre_parse_data() const { return pre_parse_data_; }
   Handle<Context> context() const { return context_; }
   BailoutId osr_ast_id() const { return osr_ast_id_; }
+  uint32_t osr_pc_offset() const { return osr_pc_offset_; }
   int opt_count() const { return opt_count_; }
   int num_parameters() const;
   int num_heap_slots() const;