Make string_util::WriteInto() DCHECK() that the supplied |length_with_null| > 1, meaning that the...

chrome/browser/automation/testing_automation_provider_win.cc

Index: chrome/browser/automation/testing_automation_provider_win.cc
===================================================================
--- chrome/browser/automation/testing_automation_provider_win.cc	(revision 107404)
+++ chrome/browser/automation/testing_automation_provider_win.cc	(working copy)
@@ -86,9 +86,10 @@
 
 void TestingAutomationProvider::GetWindowTitle(int handle, string16* text) {
   gfx::NativeWindow window = window_tracker_->GetResource(handle);
-  std::wstring result;
   int length = ::GetWindowTextLength(window) + 1;
-  ::GetWindowText(window, WriteInto(&result, length), length);
-  text->assign(WideToUTF16(result));
+  if (length > 1)
+    ::GetWindowText(window, WriteInto(text, length), length);
+  else
+    text->clear();
 }