Implement out-of-process proxy for PPB_Buffer_Dev.

webkit/plugins/ppapi/ppb_buffer_impl.cc

Index: webkit/plugins/ppapi/ppb_buffer_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_buffer_impl.cc b/webkit/plugins/ppapi/ppb_buffer_impl.cc
index 39d31915c038f442d936917696c2f34d395e4ac8..5c248d6f4463dfd27e66255f417751d2d8c0bd75 100644
--- a/webkit/plugins/ppapi/ppb_buffer_impl.cc
+++ b/webkit/plugins/ppapi/ppb_buffer_impl.cc
@@ -15,6 +15,7 @@
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 using ::ppapi::thunk::PPB_Buffer_API;
+using ::ppapi::thunk::PPB_BufferTrusted_API;
 
 namespace webkit {
 namespace ppapi {
@@ -45,6 +46,10 @@ PPB_Buffer_API* PPB_Buffer_Impl::AsPPB_Buffer_API() {
   return this;
 }
 
+PPB_BufferTrusted_API* PPB_Buffer_Impl::AsPPB_BufferTrusted_API() {
+  return this;
+}
+
 bool PPB_Buffer_Impl::Init(uint32_t size) {
   if (size == 0 || !instance())
     return false;
@@ -75,6 +80,18 @@ void PPB_Buffer_Impl::Unmap() {
   shared_memory_->Unmap();
 }
 
+int32_t PPB_Buffer_Impl::GetSharedMemory(int* shm_handle) {
+#if defined(OS_POSIX)
+  *shm_handle = shared_memory_->handle().fd;
+#elif defined(OS_WIN)
+  *shm_handle = reinterpret_cast<int>(
+      shared_memory_->handle());
+#else
+#error "Platform not supported."
+#endif
+  return PP_OK;
+}
+
 BufferAutoMapper::BufferAutoMapper(PPB_Buffer_API* api) : api_(api) {
   needs_unmap_ = !PP_ToBool(api->IsMapped());
   data_ = api->Map();