Server-side workaround to handle overlapping modules.

src/processor/basic_source_line_resolver_unittest.cc

Index: src/processor/basic_source_line_resolver_unittest.cc
diff --git a/src/processor/basic_source_line_resolver_unittest.cc b/src/processor/basic_source_line_resolver_unittest.cc
index 7d4cd5c50bc12a077447c014c36d4221acbade43..a75044c74b75da5b55a71fd39b13870a20de7185 100644
--- a/src/processor/basic_source_line_resolver_unittest.cc
+++ b/src/processor/basic_source_line_resolver_unittest.cc
@@ -68,9 +68,11 @@ class TestCodeModule : public CodeModule {
   virtual string debug_file() const { return ""; }
   virtual string debug_identifier() const { return ""; }
   virtual string version() const { return ""; }
-  virtual const CodeModule* Copy() const {
+  virtual CodeModule* Copy() const {
     return new TestCodeModule(code_file_);
   }
+  virtual uint64_t shrink_down_delta() const { return 0; }
+  virtual void SetShrinkDownDelta(uint64_t shrink_down_delta) {}
 
  private:
   string code_file_;