Prevent guest views from issuing a search for empty text.

pdf/out_of_process_instance.cc

Index: pdf/out_of_process_instance.cc
diff --git a/pdf/out_of_process_instance.cc b/pdf/out_of_process_instance.cc
index 12aad3ca8ab4865bfe9d05e038ef770274549780..cd71961ecb65e958bf9dce64a2c8579d5740b440 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -664,8 +664,8 @@ bool OutOfProcessInstance::IsPrintScalingDisabled() {
 }
 
 bool OutOfProcessInstance::StartFind(const std::string& text,
-                                                 bool case_sensitive) {
-  engine_->StartFind(text.c_str(), case_sensitive);
+                                     bool case_sensitive) {
+  engine_->StartFind(text, case_sensitive);
   return true;
 }