Introduce Pickle::{Read,Write}PODArray to serialize arrays of POD

content/common/cc_messages.cc

Index: content/common/cc_messages.cc
diff --git a/content/common/cc_messages.cc b/content/common/cc_messages.cc
index 8b54af2523c7bbff6a07c3b4005dbef09be8d995..948f1b2d6841d13ddc0da49b798c50dfb5b98123 100644
--- a/content/common/cc_messages.cc
+++ b/content/common/cc_messages.cc
@@ -249,13 +249,13 @@ void ParamTraits<gfx::Transform>::Write(
   double column_major_data[16];
   p.matrix().asColMajord(column_major_data);
 #endif
-  m->WriteBytes(&column_major_data, sizeof(SkMScalar) * 16);
+  m->WritePODArray<16>(column_major_data);
 }
 
 bool ParamTraits<gfx::Transform>::Read(
     const Message* m, PickleIterator* iter, param_type* r) {
-  const char* column_major_data;
-  if (!m->ReadBytes(iter, &column_major_data, sizeof(SkMScalar) * 16))
+  const SkMScalar* column_major_data;
+  if (!m->ReadPODArray<16>(iter, &column_major_data))
     return false;
   r->matrix().setColMajor(
       reinterpret_cast<const SkMScalar*>(column_major_data));