Build CodeSourceMap for each code object

runtime/vm/flow_graph_compiler.h

Index: runtime/vm/flow_graph_compiler.h
diff --git a/runtime/vm/flow_graph_compiler.h b/runtime/vm/flow_graph_compiler.h
index 7a1e1569a035cf7d8b0744b2811cf0d8f3d7025a..b2dc4c138868c5360aaab4d45f80c4419a39120f 100644
--- a/runtime/vm/flow_graph_compiler.h
+++ b/runtime/vm/flow_graph_compiler.h
@@ -587,6 +587,17 @@ class FlowGraphCompiler : public ValueObject {
 
   RawArray* CallerInliningIdMap() const;
 
+  CodeSourceMapBuilder* code_source_map_builder() {
+    if (code_source_map_builder_ == NULL) {
+      code_source_map_builder_ = new CodeSourceMapBuilder();
+    }
+    ASSERT(code_source_map_builder_ != NULL);
+    return code_source_map_builder_;
+  }
+
+  void SaveCodeSize();

[rmacnak, 2016/02/25 23:04:40]

Consider BeginCodeSourceRange()/EndCodeSourceRange(token)

[Cutch, 2016/02/26 15:59:22]

Done.

+  bool MaybeEmitCodeSourceMapEntry(TokenPosition token_pos);
+
  private:
   friend class CheckStackOverflowSlowPath;  // For pending_deoptimization_env_.
 
@@ -744,6 +755,8 @@ class FlowGraphCompiler : public ValueObject {
   ExceptionHandlerList* exception_handlers_list_;
   DescriptorList* pc_descriptors_list_;
   StackmapTableBuilder* stackmap_table_builder_;
+  CodeSourceMapBuilder* code_source_map_builder_;
+  intptr_t saved_code_size_;
   GrowableArray<BlockInfo*> block_info_;
   GrowableArray<CompilerDeoptInfo*> deopt_infos_;
   GrowableArray<SlowPathCode*> slow_path_code_;