Test to catch WebGL API changes. If this test should ever fail, we should re-examine the WebGL state saving/restoring logic in the InjectedScriptModule to include any latest changes to the API.

[page] Constants for gl.isEnabled():
[page] BLEND
[page] CULL_FACE
[page] DEPTH_TEST
[page] DITHER
[page] POLYGON_OFFSET_FILL
[page] SAMPLE_ALPHA_TO_COVERAGE
[page] SAMPLE_COVERAGE
[page] SCISSOR_TEST
[page] STENCIL_TEST
[page] 
Constants for gl.pixelStorei():
[page] PACK_ALIGNMENT
[page] UNPACK_ALIGNMENT
[page] UNPACK_COLORSPACE_CONVERSION_WEBGL
[page] UNPACK_FLIP_Y_WEBGL
[page] UNPACK_PREMULTIPLY_ALPHA_WEBGL
[page] 
Constants for gl.getTexParameter():
[page] TEXTURE_MAG_FILTER
[page] TEXTURE_MIN_FILTER
[page] TEXTURE_WRAP_S
[page] TEXTURE_WRAP_T
[page] 
Constants for gl.getVertexAttrib():
[page] CURRENT_VERTEX_ATTRIB
[page] VERTEX_ATTRIB_ARRAY_BUFFER_BINDING
[page] VERTEX_ATTRIB_ARRAY_ENABLED
[page] VERTEX_ATTRIB_ARRAY_NORMALIZED
[page] VERTEX_ATTRIB_ARRAY_SIZE
[page] VERTEX_ATTRIB_ARRAY_STRIDE
[page] VERTEX_ATTRIB_ARRAY_TYPE
[page] 
Constants for gl.getVertexAttribOffset():
[page] VERTEX_ATTRIB_ARRAY_POINTER
[page] 
Constants for gl.getParameter() that we do not track in InjectedScriptModule:
[page] ALIASED_LINE_WIDTH_RANGE
[page] ALIASED_POINT_SIZE_RANGE
[page] ALPHA_BITS
[page] BLUE_BITS
[page] COMPRESSED_TEXTURE_FORMATS
[page] DEPTH_BITS
[page] GREEN_BITS
[page] IMPLEMENTATION_COLOR_READ_FORMAT
[page] IMPLEMENTATION_COLOR_READ_TYPE
[page] MAX_COMBINED_TEXTURE_IMAGE_UNITS
[page] MAX_CUBE_MAP_TEXTURE_SIZE
[page] MAX_FRAGMENT_UNIFORM_VECTORS
[page] MAX_RENDERBUFFER_SIZE
[page] MAX_TEXTURE_IMAGE_UNITS
[page] MAX_TEXTURE_SIZE
[page] MAX_VARYING_VECTORS
[page] MAX_VERTEX_ATTRIBS
[page] MAX_VERTEX_TEXTURE_IMAGE_UNITS
[page] MAX_VERTEX_UNIFORM_VECTORS
[page] MAX_VIEWPORT_DIMS
[page] RED_BITS
[page] RENDERER
[page] SAMPLES
[page] SAMPLE_BUFFERS
[page] SHADING_LANGUAGE_VERSION
[page] STENCIL_BITS
[page] SUBPIXEL_BITS
[page] VENDOR
[page] VERSION