Enable find-in-page across GuestViews.

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 5d90b39620b55a0d1834550f98e12d208eb1f3b6..6735c19602a9e7a192946bf8c9474d8e19563399 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -348,9 +348,8 @@ bool OutOfProcessInstance::Init(uint32_t argc,
     }
   }
 
-  // Only allow the plugin to handle find requests if it is full frame.
-  if (full_)
-    SetPluginToHandleFindRequests();
+  // Allow the plugin to handle find requests.
+  SetPluginToHandleFindRequests();
 
   text_input_ = base::MakeUnique<pp::TextInput_Dev>(this);