remoting: Fix JSCompiler issues blocking ES6 transition.

remoting/webapp/base/js/base.js

Index: remoting/webapp/base/js/base.js
diff --git a/remoting/webapp/base/js/base.js b/remoting/webapp/base/js/base.js
index 1f853ccd168b63f14425e5a30ca2e6437900a29b..480d58ddc1f73e2314e9ac445554e6110c72b673 100644
--- a/remoting/webapp/base/js/base.js
+++ b/remoting/webapp/base/js/base.js
@@ -65,6 +65,7 @@ base.Disposable.prototype.dispose = function() {};
  * @constructor
  * @param {...base.Disposable} var_args
  * @implements {base.Disposable}
+ * @suppress {reportUnknownTypes}

[Jamie, 2015/06/24 23:50:18]

Can you add something to the CL description explaining why this is a net win? On
the face of it, we're losing type checking here; I hope that's not actually the
case, but either way, the CL should explain why we're doing it, especially with
no bug to refer to.

[James Hawkins, 2015/06/25 00:00:44]

You're not losing type checking.  You're suppressing a warning for type
operations the compiler does not know about.  In every suppression in this CL,
the issue revolves around the use of |arguments|, whose type is not well-handled
by the JSCompiler (which I wrote in the description).

[Jamie, 2015/06/25 00:10:49]

So am I right in thinking that the old compiler (or flags) did not enforce this
type check, but neither did it issue a warning,  whereas the new version issues
a warning, which we must suppress? If that's the case, then I have no objection;
it just wasn't clear without context that that's what's going on here.

  */
 base.Disposables = function(var_args) {
   /**
@@ -76,6 +77,7 @@ base.Disposables = function(var_args) {
 
 /**
  * @param {...base.Disposable} var_args
+ * @suppress {reportUnknownTypes}
  */
 base.Disposables.prototype.add = function(var_args) {
   var disposables = Array.prototype.slice.call(arguments, 0);
@@ -90,6 +92,7 @@ base.Disposables.prototype.add = function(var_args) {
 /**
  * @param {...base.Disposable} var_args  Dispose |var_args| and remove
  *    them from the current object.
+ * @suppress {reportUnknownTypes}
  */
 base.Disposables.prototype.remove = function(var_args) {
   var disposables = Array.prototype.slice.call(arguments, 0);