Update target of texStorage2D for ES 3

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 1f14e2853d2bbaec1d659f4d3e67ad778f855475..3006888aa6be6eb6ea13e02bd0c21cf9d061cca5 100644
--- a/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
+++ b/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
@@ -116,7 +116,7 @@ TEST_F(TextureStorageTest, BadTarget) {
     return;
 
   EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
-  glTexStorage2DEXT(GL_TEXTURE_CUBE_MAP, 1, GL_RGBA8_OES, 4, 4);
+  glTexStorage2DEXT(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 1, GL_RGBA8_OES, 4, 4);
   EXPECT_EQ(static_cast<GLenum>(GL_INVALID_ENUM), glGetError());
 }