breakpad: fix unittest errors

src/common/dwarf/dwarf2reader_die_unittest.cc

Index: src/common/dwarf/dwarf2reader_die_unittest.cc
diff --git a/src/common/dwarf/dwarf2reader_die_unittest.cc b/src/common/dwarf/dwarf2reader_die_unittest.cc
index b53104fbfdc45e737c0d16569c2aca37d0258f22..71418eb8d76170d7a3c5644d2788c2343bc8ac58 100644
--- a/src/common/dwarf/dwarf2reader_die_unittest.cc
+++ b/src/common/dwarf/dwarf2reader_die_unittest.cc
@@ -199,7 +199,7 @@ TEST_P(DwarfHeader, Header) {
 
   ByteReader byte_reader(GetParam().endianness == kLittleEndian ?
                          ENDIANNESS_LITTLE : ENDIANNESS_BIG);
-  CompilationUnit parser(MakeSectionMap(), 0, &byte_reader, &handler);
+  CompilationUnit parser("", MakeSectionMap(), 0, &byte_reader, &handler);
   EXPECT_EQ(parser.Start(), info_contents.size());
 }
 
@@ -277,7 +277,7 @@ struct DwarfFormsFixture: public DIEFixture {
   void ParseCompilationUnit(const DwarfHeaderParams &params, uint64 offset=0) {
     ByteReader byte_reader(params.endianness == kLittleEndian ?
                            ENDIANNESS_LITTLE : ENDIANNESS_BIG);
-    CompilationUnit parser(MakeSectionMap(), offset, &byte_reader, &handler);
+    CompilationUnit parser("", MakeSectionMap(), offset, &byte_reader, &handler);
     EXPECT_EQ(offset + parser.Start(), info_contents.size());
   }