gdata: Fix a bug that caused google drive not to load

chrome/browser/chromeos/gdata/gdata_files_unittest.cc

Index: chrome/browser/chromeos/gdata/gdata_files_unittest.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_files_unittest.cc b/chrome/browser/chromeos/gdata/gdata_files_unittest.cc
index 9769c69f111fcbeff60258e36b0fefe59af1afe2..35cbc637388d80ab1fe401bca4fe74e840870a41 100644
--- a/chrome/browser/chromeos/gdata/gdata_files_unittest.cc
+++ b/chrome/browser/chromeos/gdata/gdata_files_unittest.cc
@@ -7,6 +7,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include "chrome/browser/chromeos/gdata/gdata.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gdata {
@@ -48,4 +49,34 @@ TEST(GDataRootDirectoryTest, RemoveTemporaryFilesFromCacheMap) {
 
 }
 
+TEST(GDataRootDirectoryTest, ParseFromString_DetectBadTitle) {
+  GDataRootDirectoryProto proto;
+
+  std::string serialized_proto;
+  ASSERT_TRUE(proto.SerializeToString(&serialized_proto));
+
+  GDataRootDirectory root;
+  // This should fail as the title is empty.
+  // root.title() should be unchanged.
+  ASSERT_FALSE(root.ParseFromString(serialized_proto));
+  ASSERT_EQ("drive", root.title());
+
+  // Setting the title to "gdata".
+  proto.mutable_gdata_directory()->mutable_gdata_entry()->set_title("gdata");
+  ASSERT_TRUE(proto.SerializeToString(&serialized_proto));
+
+  // This should fail as the title is not "drive".
+  // root.title() should be unchanged.
+  ASSERT_FALSE(root.ParseFromString(serialized_proto));
+  ASSERT_EQ("drive", root.title());
+
+  // Setting the title to "drive".
+  proto.mutable_gdata_directory()->mutable_gdata_entry()->set_title("drive");
+  ASSERT_TRUE(proto.SerializeToString(&serialized_proto));
+
+  // This should succeed as the title is "drive".
+  ASSERT_TRUE(root.ParseFromString(serialized_proto));
+  ASSERT_EQ("drive", root.title());
+}
+
 }  // namespace gdata