Remove special handling for strings in var serialization.

ppapi/proxy/var_serialization_rules.h

Index: ppapi/proxy/var_serialization_rules.h
diff --git a/ppapi/proxy/var_serialization_rules.h b/ppapi/proxy/var_serialization_rules.h
index 92d0db899b9872b1368d244d19e971c800185682..bfedb061b941548d8861ef5ebc679010964dc98c 100644
--- a/ppapi/proxy/var_serialization_rules.h
+++ b/ppapi/proxy/var_serialization_rules.h
@@ -28,24 +28,17 @@ class VarSerializationRules {
   // argument. The caller has a reference to the var, and the caller is
   // responsible for freeing that reference.
 
-  // Prepares the given var for sending to the remote process. If the var is a
-  // string, *str_ptr_out will be set to point to the string in the tracker
-  // referenced by var. If the var is not a string, *str_ptr_out will be
-  // untouched and may be NULL. For object vars, the returned var will contain
-  // the id valid for the host process. Otherwise, the returned var is valid in
-  // the local process.
-  virtual PP_Var SendCallerOwned(const PP_Var& var,
-                                 const std::string** str_ptr_out) = 0;
+  // Prepares the given var for sending to the remote process. For object vars,
+  // the returned var will contain the id valid for the host process.
+  // Otherwise, the returned var is valid in the local process.
+  virtual PP_Var SendCallerOwned(const PP_Var& var) = 0;
 
   // When receiving a caller-owned variable, normally we don't have to do
   // anything. However, in the case of strings, we need to deserialize the
-  // string from IPC, create a new PP_Var string in the local process, call the
-  // function, and then destroy the temporary string. These two functions
-  // handle that process.
+  // string from IPC, call the function, and then destroy the temporary string.
+  // These two functions handle that process.
   //
-  // BeginReceiveCallerOwned takes a var from IPC and an optional pointer to
-  // the deserialized string (which will be used only when var is a
-  // VARTYPE_STRING and may be NULL otherwise) and returns a new var
+  // BeginReceiveCallerOwned takes a var from IPC and returns a new var
   // representing the input in the local process.
   //
   // EndReceiveCallerOwned releases the reference count in the Var tracker for
@@ -53,7 +46,6 @@ class VarSerializationRules {
   // took a reference to the Var, it will remain in the tracker after
   // EndReceiveCallerOwned).
   virtual PP_Var BeginReceiveCallerOwned(const PP_Var& var,
-                                         scoped_ptr<std::string> str,
                                          Dispatcher* dispatcher) = 0;
   virtual void EndReceiveCallerOwned(const PP_Var& var) = 0;
 
@@ -68,24 +60,21 @@ class VarSerializationRules {
   // return value).
 
   // Creates a var in the context of the local process from the given
-  // deserialized var and deserialized string (which will be used only when var
-  // is a VARTYPE_STRING and may be NULL otherwise). The input var/string
-  // should be the result of calling SendPassRef in the remote process. The
-  // return value is the var valid in the host process for object vars.
-  // Otherwise, the return value is a var which is valid in the local process.
+  // deserialized var. The input var should be the result of calling
+  // SendPassRef in the remote process. The return value is the var valid in
+  // the host process for object vars. Otherwise, the return value is a var
+  // which is valid in the local process.
   virtual PP_Var ReceivePassRef(const PP_Var& var,
-                                scoped_ptr<std::string> str,
                                 Dispatcher* dispatcher) = 0;
 
   // Prepares a var to be sent to the remote side. One local reference will
   // be passed to the remote side. Call Begin* before doing the send and End*
-  // after doing the send. See SendCallerOwned for a description of the string.
+  // after doing the send
   //
   // For object vars, the return value from BeginSendPassRef will be the var
   // valid for the host process. Otherwise, it is a var that is valid in the
   // local process. This same var must be passed to EndSendPassRef.
-  virtual PP_Var BeginSendPassRef(const PP_Var& var,
-                                  const std::string** str_ptr_out) = 0;
+  virtual PP_Var BeginSendPassRef(const PP_Var& var) = 0;
   virtual void EndSendPassRef(const PP_Var& var, Dispatcher* dispatcher) = 0;
 
   // ---------------------------------------------------------------------------