Restore samplers' state across virtualized GL contexts.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
index 45789ca0e4569a00e9c1dd1cbbb925e55d91c3c0..5b3bde3ec606552ea9a1d993011f86c9e0a9d4a9 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
@@ -250,6 +250,9 @@ class GLES2DecoderTestBase : public ::testing::TestWithParam<bool> {
   void SetupSamplerExternalProgram();
   void SetupTexture();
 
+  // Sets up a sampler on texture unit 0 for certain ES3-specific tests.
+  void SetupSampler();
+
   // Note that the error is returned as GLint instead of GLenum.
   // This is because there is a mismatch in the types of GLenum and
   // the error values GL_NO_ERROR, GL_INVALID_ENUM, etc. GLenum is