WebGLProgram: Clean up.

src/renderers/webgl/WebGLProgram.js

@@ -37,14 +37,14 @@ function getEncodingComponents( encoding ) {
 function getTexelDecodingFunction( functionName, encoding ) {
 
 	var components = getEncodingComponents( encoding );
-	return "vec4 " + functionName + "( vec4 value ) { return " + components[ 0 ] + "ToLinear" + components[ 1 ] + "; }";
+	return 'vec4 ' + functionName + '( vec4 value ) { return ' + components[ 0 ] + 'ToLinear' + components[ 1 ] + '; }';
 
 }
 
 function getTexelEncodingFunction( functionName, encoding ) {
 
 	var components = getEncodingComponents( encoding );
-	return "vec4 " + functionName + "( vec4 value ) { return LinearTo" + components[ 0 ] + components[ 1 ] + "; }";
+	return 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[ 0 ] + components[ 1 ] + '; }';
 
 }
 
@@ -55,19 +55,19 @@ function getToneMappingFunction( functionName, toneMapping ) {
 	switch ( toneMapping ) {
 
 		case LinearToneMapping:
-			toneMappingName = "Linear";
+			toneMappingName = 'Linear';
 			break;
 
 		case ReinhardToneMapping:
-			toneMappingName = "Reinhard";
+			toneMappingName = 'Reinhard';
 			break;
 
 		case Uncharted2ToneMapping:
-			toneMappingName = "Uncharted2";
+			toneMappingName = 'Uncharted2';
 			break;
 
 		case CineonToneMapping:
-			toneMappingName = "OptimizedCineon";
+			toneMappingName = 'OptimizedCineon';
 			break;
 
 		default:
@@ -75,7 +75,7 @@ function getToneMappingFunction( functionName, toneMapping ) {
 
 	}
 
-	return "vec3 " + functionName + "( vec3 color ) { return " + toneMappingName + "ToneMapping( color ); }";
+	return 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';
 
 }
 
@@ -468,9 +468,9 @@ function WebGLProgram( renderer, extensions, code, material, shader, parameters
 			parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
 			parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',
 
-			parameters.premultipliedAlpha ? "#define PREMULTIPLIED_ALPHA" : '',
+			parameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '',
 
-			parameters.physicallyCorrectLights ? "#define PHYSICALLY_CORRECT_LIGHTS" : '',
+			parameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '',
 
 			parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
 			parameters.logarithmicDepthBuffer && extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',
@@ -480,9 +480,9 @@ function WebGLProgram( renderer, extensions, code, material, shader, parameters
 			'uniform mat4 viewMatrix;',
 			'uniform vec3 cameraPosition;',
 
-			( parameters.toneMapping !== NoToneMapping ) ? "#define TONE_MAPPING" : '',
+			( parameters.toneMapping !== NoToneMapping ) ? '#define TONE_MAPPING' : '',
 			( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '', // this code is required here because it is used by the toneMapping() function defined below
-			( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( "toneMapping", parameters.toneMapping ) : '',
+			( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( 'toneMapping', parameters.toneMapping ) : '',
 
 			parameters.dithering ? '#define DITHERING' : '',
 
@@ -490,9 +490,9 @@ function WebGLProgram( renderer, extensions, code, material, shader, parameters
 			parameters.mapEncoding ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',
 			parameters.envMapEncoding ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',
 			parameters.emissiveMapEncoding ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',
-			parameters.outputEncoding ? getTexelEncodingFunction( "linearToOutputTexel", parameters.outputEncoding ) : '',
+			parameters.outputEncoding ? getTexelEncodingFunction( 'linearToOutputTexel', parameters.outputEncoding ) : '',
 
-			parameters.depthPacking ? "#define DEPTH_PACKING " + material.depthPacking : '',
+			parameters.depthPacking ? '#define DEPTH_PACKING ' + material.depthPacking : '',
 
 			'\n'