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 cfa11ba980be40c03c854e760bb54365d3a76219..d5f6e8118b784302685568326438bc1c6db2ef0b 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -656,8 +656,8 @@ 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;
 }