Implementing FlushMappedBufferRange in GPU command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc
index 3c7c4267e86536f7df4566489fed542147f81277..0ad07821cc5a97c0e160ea22eb96378fd03f1f32 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc
@@ -3875,6 +3875,22 @@ error::Error GLES2DecoderPassthroughImpl::HandleGetMaxValueInBufferCHROMIUM(
   return error::kNoError;
 }
 
+error::Error GLES2DecoderPassthroughImpl::HandleFlushMappedBufferRange(
+    uint32_t immediate_data_size,
+    const volatile void* cmd_data) {
+  const volatile gles2::cmds::FlushMappedBufferRange& c =
+      *static_cast<const volatile gles2::cmds::FlushMappedBufferRange*>(
+          cmd_data);
+  GLenum target = static_cast<GLenum>(c.target);
+  GLintptr offset = static_cast<GLintptr>(c.offset);
+  GLsizeiptr size = static_cast<GLsizeiptr>(c.size);
+  error::Error error = DoFlushMappedBufferRange(target, offset, size);
+  if (error != error::kNoError) {
+    return error;
+  }
+  return error::kNoError;
+}
+
 error::Error GLES2DecoderPassthroughImpl::HandleCopyTextureCHROMIUM(
     uint32_t immediate_data_size,
     const volatile void* cmd_data) {