Clean up WebGLProgram

src/renderers/webgl/WebGLProgram.js

@@ -79,15 +79,15 @@ function getToneMappingFunction( functionName, toneMapping ) {
 
 }
 
-function generateExtensions( extensions, parameters, rendererExtensions, isWebGL2 ) {
+function generateExtensions( extensions, parameters, rendererExtensions ) {
 
 	extensions = extensions || {};
 
 	var chunks = [
-		( ! isWebGL2 && ( extensions.derivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.normalMap || parameters.flatShading ) ) ? '#extension GL_OES_standard_derivatives : enable' : '',
-		( ! isWebGL2 && ( extensions.fragDepth || parameters.logarithmicDepthBuffer ) && rendererExtensions.get( 'EXT_frag_depth' ) ) ? '#extension GL_EXT_frag_depth : enable' : '',
+		( extensions.derivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.normalMap || parameters.flatShading ) ? '#extension GL_OES_standard_derivatives : enable' : '',
+		( extensions.fragDepth || parameters.logarithmicDepthBuffer ) && rendererExtensions.get( 'EXT_frag_depth' ) ? '#extension GL_EXT_frag_depth : enable' : '',
 		( extensions.drawBuffers ) && rendererExtensions.get( 'WEBGL_draw_buffers' ) ? '#extension GL_EXT_draw_buffers : require' : '',
-		( ! isWebGL2 && ( extensions.shaderTextureLOD || parameters.envMap ) && rendererExtensions.get( 'EXT_shader_texture_lod' ) ) ? '#extension GL_EXT_shader_texture_lod : enable' : ''
+		( extensions.shaderTextureLOD || parameters.envMap ) && rendererExtensions.get( 'EXT_shader_texture_lod' ) ? '#extension GL_EXT_shader_texture_lod : enable' : ''
 	];
 
 	return chunks.filter( filterEmptyLine ).join( '\n' );
@@ -287,7 +287,7 @@ function WebGLProgram( renderer, extensions, code, material, shader, parameters
 
 	//
 
-	var customExtensions = generateExtensions( material.extensions, parameters, extensions, isWebGL2 );
+	var customExtensions = isWebGL2 ? '' : generateExtensions( material.extensions, parameters, extensions );
 
 	var customDefines = generateDefines( defines );