Rewrite std::string("") to std::string(), Linux edition.
This patch was generated by running the empty_string clang tool
across the Chromium Linux compilation database. Implicitly or
explicitly constructing std::string() with a "" argument is
inefficient as the caller needs to emit extra instructions to
pass an argument, and the constructor needlessly copies a byte
into internal storage. Rewriting these instances to simply call
the default constructor appears to save ~14-18 kilobytes on an
optimized release build.
BUG=none
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=193020
Review URL: https://codereview.chromium.org/13145003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193040 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/values_unittest.cc b/base/values_unittest.cc
index 98bc73c..bad83fa 100644
--- a/base/values_unittest.cc
+++ b/base/values_unittest.cc
@@ -599,7 +599,7 @@
// Make sure we don't prune too much.
root->SetBoolean("bool", true);
root->Set("empty_dict", new DictionaryValue);
- root->SetString("empty_string", "");
+ root->SetString("empty_string", std::string());
root.reset(root->DeepCopyWithoutEmptyChildren());
EXPECT_EQ(2U, root->size());
