Add new externs translation for w3c_navigation_timing. (#915)

* Add new externs translation for w3c_navigation_timing.

* Change golden test output to match JSCompiler change.

Recently, /** */ syntax that does not contain @const, @type, etc,
directives is no longer considered JsDoc by the compiler and clutz will
no longer emit it.

Since most closure code does have some type anotation I don't think this
will have much effect on clutz.

Author: rkirov

src/test/java/com/google/javascript/clutz/testdata/base.d.ts

@@ -23,10 +23,7 @@ declare namespace goog {
   function inherits (childCtor : Function , parentCtor : Function ) : void ;
   function isDef (val : any ) : boolean ;
   function require (name : string ) : ಠ_ಠ.clutz.ClosureSymbolNotGoogProvided;
-  let /**
-   * Reference to the global context.  In most cases this will be 'window'.
-   */
-  global : any ;
+  let global : any ;
 }
 // Generated from src/test/java/com/google/javascript/clutz/testdata/base.js
 declare namespace ಠ_ಠ.clutz.goog {

src/test/java/com/google/javascript/clutz/testdata/general_with_platform.d.ts

@@ -626,6 +626,18 @@ declare namespace ಠ_ಠ.clutz {
     writeText (text : string ) : Promise < undefined > ;
   }
 }
+// Generated from externs.zip//w3c_navigation_timing.js
+declare namespace ಠ_ಠ.clutz {
+  /**
+   * https://wicg.github.io/layout-instability/#sec-layout-shift
+   */
+  class LayoutShift extends PerformanceEntry {
+    private noStructuralTyping_LayoutShift : any;
+    hadRecentInput : boolean ;
+    lastInputTime : number ;
+    value : number ;
+  }
+}
 // Generated from externs.zip//w3c_rtc.js
 declare namespace ಠ_ಠ.clutz {
   class BlobEvent extends GlobalEvent {

src/test/java/com/google/javascript/clutz/testdata/outputBase/function_alias_output_base.d.ts

@@ -23,10 +23,7 @@ declare namespace goog {
   function inherits (childCtor : ಠ_ಠ.clutz.partial.FunctionAlias , parentCtor : ಠ_ಠ.clutz.partial.FunctionAlias ) : void ;
   function isDef (val : any ) : boolean ;
   function require (name : string ) : ಠ_ಠ.clutz.ClosureSymbolNotGoogProvided;
-  let /**
-   * Reference to the global context.  In most cases this will be 'window'.
-   */
-  global : any ;
+  let global : any ;
 }
 // Generated from src/test/java/com/google/javascript/clutz/testdata/base.js
 declare namespace ಠ_ಠ.clutz.goog {

src/test/java/com/google/javascript/clutz/testdata/partial/abstract_method_partial.d.ts

@@ -6,9 +6,6 @@ declare namespace ಠ_ಠ.clutz {
      * It appears that this one is emitted correctly without partial_goog_base.js
      */
     methodWithTypes ( ) : number ;
-    /**
-     * But this one needs partial_goog_base.js
-     */
     methodWithoutTypes ( ...a : any [] ) : any ;
   }
 }

src/test/java/com/google/javascript/clutz/testdata/prototype_inferred_type.d.ts

@@ -2,9 +2,6 @@
 declare namespace ಠ_ಠ.clutz.foo {
   class Klass {
     private noStructuralTyping_foo_Klass : any;
-    /**
-     * Crazy pattern, I have only seen it used by jquery.fn = jquery.prototype
-     */
     static foo : any ;
   }
 }