WebGLRenderer: Clean up. See #8264 #8290.

src/renderers/WebGLRenderer.js

@@ -198,6 +198,18 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 		}
 
+		// Some experimental-webgl implementations do not have getShaderPrecisionFormat
+
+		if ( _gl.getShaderPrecisionFormat === undefined ) {
+
+			_gl.getShaderPrecisionFormat = function () {
+
+				return { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };
+
+			};
+
+		}
+
 		_canvas.addEventListener( 'webglcontextlost', onContextLost, false );
 
 	} catch ( error ) {
@@ -221,20 +233,6 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 	}
 
-	if ( _gl.getShaderPrecisionFormat === undefined ) {
-
-		_gl.getShaderPrecisionFormat = function () {
-
-			return {
-				'rangeMin': 1,
-				'rangeMax': 1,
-				'precision': 1
-			};
-
-		}
-
-	}
-
 	var capabilities = new THREE.WebGLCapabilities( _gl, extensions, parameters );
 
 	var state = new THREE.WebGLState( _gl, extensions, paramThreeToGL );