Handle GLES2::ConsumeTextureCHROMIUM consuming the currently bound texture.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
index 266869dfdb44b51bf0aeddbf1500af73cfd029b4..e7a689dd7a29a6ee44c8dc73692d1dc0a55b3f78 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
@@ -3267,6 +3267,38 @@ TEST_P(GLES2DecoderTest, ProduceAndConsumeTextureCHROMIUM) {
   EXPECT_EQ(kServiceTextureId, texture->service_id());
 }
 
+TEST_P(GLES2DecoderTest, ConsumeAlreadyBoundTexture) {
+  Mailbox mailbox = Mailbox::Generate();
+
+  DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 3, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0,
+               0);
+
+  TextureRef* texture_ref1 =
+      group().texture_manager()->GetTexture(client_texture_id_);
+
+  ProduceTextureCHROMIUMImmediate& produce_cmd =
+      *GetImmediateAs<ProduceTextureCHROMIUMImmediate>();
+  produce_cmd.Init(GL_TEXTURE_2D, mailbox.name);
+  EXPECT_EQ(error::kNoError,
+            ExecuteImmediateCmd(produce_cmd, sizeof(mailbox.name)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+
+  // Consume texture that is already bound.  Operation should succeed, leaving
+  // existing texture bound with no extra GL calls expected.
+  ConsumeTextureCHROMIUMImmediate& consume_cmd =
+      *GetImmediateAs<ConsumeTextureCHROMIUMImmediate>();
+  consume_cmd.Init(GL_TEXTURE_2D, mailbox.name);
+  EXPECT_EQ(error::kNoError,
+            ExecuteImmediateCmd(consume_cmd, sizeof(mailbox.name)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+
+  TextureRef* texture_ref2 =
+      group().texture_manager()->GetTexture(client_texture_id_);
+
+  EXPECT_EQ(texture_ref1, texture_ref2);
+}
+
 TEST_P(GLES2DecoderTest, ProduceAndConsumeDirectTextureCHROMIUM) {
   Mailbox mailbox = Mailbox::Generate();