Create a dummy texture when the mailbox is invalid in CreateAndConsum…

…eTexture.

If glCreateAndConsumeTextureINTERNAL fails to find a mailbox, the client still
expects the texture ID to be valid.  If the texture does not exist, the ID could
overlap with another and display incorrect textures.

BUG=851878

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I53cea969fcace7246ebce8fc193b3246f511fbc3
Reviewed-on: https://chromium-review.googlesource.com/1129464
Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573719}

gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc

@@ -3988,6 +3988,9 @@ error::Error GLES2DecoderPassthroughImpl::DoCreateAndConsumeTextureINTERNAL(
   scoped_refptr<TexturePassthrough> texture = static_cast<TexturePassthrough*>(
       group_->mailbox_manager()->ConsumeTexture(mb));
   if (texture == nullptr) {
+    // Create texture to handle invalid mailbox (see http://crbug.com/472465 and
+    // http://crbug.com/851878).
+    DoGenTextures(1, &texture_client_id);
     InsertError(GL_INVALID_OPERATION, "Invalid mailbox name.");
     return error::kNoError;
   }