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

1 files changed, 5 insertions, 5 deletions

diff --git a/chrome/browser/extensions/api/management/management_api_browsertest.cc b/chrome/browser/extensions/api/management/management_api_browsertest.cc
index f475e81..5b6b04d 100644
--- a/chrome/browser/extensions/api/management/management_api_browsertest.cc
+++ b/chrome/browser/extensions/api/management/management_api_browsertest.cc
@@ -257,15 +257,15 @@ IN_PROC_BROWSER_TEST_F(ExtensionManagementApiEscalationTest,
   // This should succeed when user accepts dialog.
   CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kAppsGalleryInstallAutoConfirmForTests, "accept");
-  SetEnabled(true, true, "");
+  SetEnabled(true, true, std::string());
 
   // Crash the extension. Mock a reload by disabling and then enabling. The
   // extension should be reloaded and enabled.
   ASSERT_TRUE(CrashEnabledExtension(kId));
-  SetEnabled(false, true, "");
-  SetEnabled(true, true, "");
-  const Extension* extension = ExtensionSystem::Get(browser()->profile())->
-      extension_service()->GetExtensionById(kId, false);
+  SetEnabled(false, true, std::string());
+  SetEnabled(true, true, std::string());
+  const Extension* extension = ExtensionSystem::Get(browser()->profile())
+      ->extension_service()->GetExtensionById(kId, false);
   EXPECT_TRUE(extension);
 }