Reduce GPU mailbox size to 16 bytes

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 a3a0ec992fafea0279c285e472bc55118f3200a4..de6cafdad516952df67f78ab451e578b7e29ac53 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -4648,7 +4648,7 @@ error::Error GLES2DecoderImpl::HandleProduceTextureCHROMIUMImmediate(
       const volatile gles2::cmds::ProduceTextureCHROMIUMImmediate*>(cmd_data);
   GLenum target = static_cast<GLenum>(c.target);
   uint32_t data_size;
-  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 64, &data_size)) {
+  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 16, &data_size)) {
     return error::kOutOfBounds;
   }
   if (data_size > immediate_data_size) {
@@ -4678,7 +4678,7 @@ error::Error GLES2DecoderImpl::HandleProduceTextureDirectCHROMIUMImmediate(
   GLuint texture = c.texture;
   GLenum target = static_cast<GLenum>(c.target);
   uint32_t data_size;
-  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 64, &data_size)) {
+  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 16, &data_size)) {
     return error::kOutOfBounds;
   }
   if (data_size > immediate_data_size) {
@@ -4705,7 +4705,7 @@ error::Error GLES2DecoderImpl::HandleConsumeTextureCHROMIUMImmediate(
       const volatile gles2::cmds::ConsumeTextureCHROMIUMImmediate*>(cmd_data);
   GLenum target = static_cast<GLenum>(c.target);
   uint32_t data_size;
-  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 64, &data_size)) {
+  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 16, &data_size)) {
     return error::kOutOfBounds;
   }
   if (data_size > immediate_data_size) {
@@ -4734,7 +4734,7 @@ error::Error GLES2DecoderImpl::HandleCreateAndConsumeTextureINTERNALImmediate(
   GLenum target = static_cast<GLenum>(c.target);
   GLuint texture = static_cast<GLuint>(c.texture);
   uint32_t data_size;
-  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 64, &data_size)) {
+  if (!GLES2Util::ComputeDataSize(1, sizeof(GLbyte), 16, &data_size)) {
     return error::kOutOfBounds;
   }
   if (data_size > immediate_data_size) {