gpu: Clarify sized texture format is available only if ES3 context or immutable texture is supported

gpu/command_buffer/tests/gl_texture_storage_unittest.cc

Index: gpu/command_buffer/tests/gl_texture_storage_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_texture_storage_unittest.cc b/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
index f5d9a6141354c282673f9af4a0f015d4cfad8e51..7803bfba23087d44624bd9603fa4258ae9319c89 100644
--- a/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
+++ b/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
@@ -156,6 +156,17 @@ TEST_F(TextureStorageTest, CannotRedefine) {
   EXPECT_EQ(static_cast<GLenum>(GL_INVALID_OPERATION), glGetError());
 }
 
+TEST_F(TextureStorageTest, InternalFormatBleedingToTexImage) {
+  if (!extension_available_)
+    return;
+
+  EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
+  // The context is ES2 context.
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8_OES, 4, 4, 0, GL_RGBA,
+               GL_UNSIGNED_BYTE, nullptr);
+  EXPECT_EQ(static_cast<GLenum>(GL_INVALID_VALUE), glGetError());
+}
+
 }  // namespace gpu