Add support for Var arrays to ArrayWriter.

ppapi/shared_impl/array_writer.cc

Index: ppapi/shared_impl/array_writer.cc
diff --git a/ppapi/shared_impl/array_writer.cc b/ppapi/shared_impl/array_writer.cc
index 957ff77237baa5f2fe5370acbaef777564b5a335..26ee1bd669b00d38f36ee4cb3c5cbed61edf88e0 100644
--- a/ppapi/shared_impl/array_writer.cc
+++ b/ppapi/shared_impl/array_writer.cc
@@ -9,6 +9,8 @@
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/shared_impl/resource_tracker.h"
+#include "ppapi/shared_impl/var.h"
+#include "ppapi/shared_impl/var_tracker.h"
 
 namespace ppapi {
 
@@ -76,4 +78,52 @@ bool ArrayWriter::StoreResourceVector(const std::vector<PP_Resource>& input) {
   return true;
 }
 
+bool ArrayWriter::StoreVarVector(
+    const std::vector< scoped_refptr<Var> >& input) {
+  // Always call the alloc function, even on 0 array size.
+  void* dest = pp_array_output_.GetDataBuffer(
+      pp_array_output_.user_data,
+      static_cast<uint32_t>(input.size()),
+      sizeof(PP_Var));
+
+  // Regardless of success, we clear the output to prevent future calls on
+  // this same output object.
+  Reset();
+
+  if (input.empty())
+    return true;  // Allow plugin to return NULL on 0 elements.
+  if (!dest)
+    return false;
+
+  // Convert to PP_Vars.
+  PP_Var* dest_vars = static_cast<PP_Var*>(dest);
+  for (size_t i = 0; i < input.size(); i++)
+    dest_vars[i] = input[i]->GetPPVar();
+  return true;
+}
+
+bool ArrayWriter::StoreVarVector(const std::vector<PP_Var>& input) {
+  // Always call the alloc function, even on 0 array size.
+  void* dest = pp_array_output_.GetDataBuffer(
+      pp_array_output_.user_data,
+      static_cast<uint32_t>(input.size()),
+      sizeof(PP_Var));
+
+  // Regardless of success, we clear the output to prevent future calls on
+  // this same output object.
+  Reset();
+
+  if (input.empty())
+    return true;  // Allow plugin to return NULL on 0 elements.
+  if (!dest) {
+    // Free the vars.
+    for (size_t i = 0; i < input.size(); i++)
+      PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(input[i]);
+    return false;
+  }
+
+  std::copy(input.begin(), input.end(), static_cast<PP_Var*>(dest));
+  return true;
+}
+
 }  // namespace ppapi