Add MinidumpCrashpadInfoWriter::InitializeFromSnapshot() and its test

minidump/minidump_module_crashpad_info_writer_test.cc

Index: minidump/minidump_module_crashpad_info_writer_test.cc
diff --git a/minidump/minidump_module_crashpad_info_writer_test.cc b/minidump/minidump_module_crashpad_info_writer_test.cc
index 47aa760187312fb59af3d615540397a0f21b1113..a798f03f0273e7b90ba513e28ce6be13cbefafba 100644
--- a/minidump/minidump_module_crashpad_info_writer_test.cc
+++ b/minidump/minidump_module_crashpad_info_writer_test.cc
@@ -34,6 +34,7 @@ TEST(MinidumpModuleCrashpadInfoWriter, EmptyList) {
   StringFileWriter file_writer;
 
   MinidumpModuleCrashpadInfoListWriter module_list_writer;
+  EXPECT_FALSE(module_list_writer.IsUseful());
 
   EXPECT_TRUE(module_list_writer.WriteEverything(&file_writer));
   ASSERT_EQ(sizeof(MinidumpModuleCrashpadInfoList),
@@ -53,6 +54,8 @@ TEST(MinidumpModuleCrashpadInfoWriter, EmptyModule) {
   EXPECT_FALSE(module_writer->IsUseful());
   module_list_writer.AddModule(module_writer.Pass());
 
+  EXPECT_TRUE(module_list_writer.IsUseful());
+
   EXPECT_TRUE(module_list_writer.WriteEverything(&file_writer));
   ASSERT_EQ(sizeof(MinidumpModuleCrashpadInfoList) +
                 sizeof(MINIDUMP_LOCATION_DESCRIPTOR) +
@@ -105,6 +108,8 @@ TEST(MinidumpModuleCrashpadInfoWriter, FullModule) {
   EXPECT_TRUE(module_writer->IsUseful());
   module_list_writer.AddModule(module_writer.Pass());
 
+  EXPECT_TRUE(module_list_writer.IsUseful());
+
   EXPECT_TRUE(module_list_writer.WriteEverything(&file_writer));
   ASSERT_EQ(sizeof(MinidumpModuleCrashpadInfoList) +
                 sizeof(MINIDUMP_LOCATION_DESCRIPTOR) +
@@ -213,6 +218,8 @@ TEST(MinidumpModuleCrashpadInfoWriter, ThreeModules) {
   EXPECT_TRUE(module_writer_2->IsUseful());
   module_list_writer.AddModule(module_writer_2.Pass());
 
+  EXPECT_TRUE(module_list_writer.IsUseful());
+
   EXPECT_TRUE(module_list_writer.WriteEverything(&file_writer));
 
   const MinidumpModuleCrashpadInfoList* module_list =
@@ -335,6 +342,7 @@ TEST(MinidumpModuleCrashpadInfoWriter, InitializeFromSnapshot) {
 
   MinidumpModuleCrashpadInfoListWriter module_list_writer;
   module_list_writer.InitializeFromSnapshot(module_snapshots);
+  EXPECT_TRUE(module_list_writer.IsUseful());
 
   StringFileWriter file_writer;
   ASSERT_TRUE(module_list_writer.WriteEverything(&file_writer));