Implementing FlushMappedBufferRange in GPU command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
index be522e7747feef283cda17b7c56bd219ceb8f34a..3d45a1855b57b88fb99da9f1ab16d8dff1523ca6 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -4889,6 +4889,31 @@ error::Error GLES2DecoderImpl::HandleGetMaxValueInBufferCHROMIUM(
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandleFlushMappedBufferRange(
+    uint32_t immediate_data_size,
+    const volatile void* cmd_data) {
+  if (!unsafe_es3_apis_enabled())
+    return error::kUnknownCommand;
+  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);
+  if (!validators_->buffer_target.IsValid(target)) {
+    LOCAL_SET_GL_ERROR_INVALID_ENUM("glFlushMappedBufferRange", target,
+                                    "target");
+    return error::kNoError;
+  }
+  if (size < 0) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, "glFlushMappedBufferRange",
+                       "size < 0");
+    return error::kNoError;
+  }
+  DoFlushMappedBufferRange(target, offset, size);
+  return error::kNoError;
+}
+
 error::Error GLES2DecoderImpl::HandleCopyTextureCHROMIUM(
     uint32_t immediate_data_size,
     const volatile void* cmd_data) {