Remove trailing whitespaces from *.js files.

src/d8.js

Index: src/d8.js
===================================================================
--- src/d8.js	(revision 8946)
+++ src/d8.js	(working copy)
@@ -392,14 +392,14 @@
           this.frameCommandToJSONRequest_('' +
                                           (Debug.State.currentFrame + 1));
       break;
-      
+
     case 'down':
     case 'do':
       this.request_ =
           this.frameCommandToJSONRequest_('' +
                                           (Debug.State.currentFrame - 1));
       break;
-      
+
     case 'set':
     case 'print':
     case 'p':
@@ -1072,7 +1072,7 @@
         arg2 = 'uncaught';
       }
       excType = arg2;
-      
+
     // Check for:
     //   en[able] [all|unc[aught]] exc[eptions]
     //   dis[able] [all|unc[aught]] exc[eptions]
@@ -1131,7 +1131,7 @@
         request.arguments.ignoreCount = parseInt(otherArgs);
         break;
       default:
-        throw new Error('Invalid arguments.');  
+        throw new Error('Invalid arguments.');
     }
   } else {
     throw new Error('Invalid arguments.');
@@ -1252,7 +1252,7 @@
       start_index = parseInt(args[i]);
       // The user input start index starts at 1:
       if (start_index <= 0) {
-        throw new Error('Invalid index ' + args[i] + '.');                
+        throw new Error('Invalid index ' + args[i] + '.');
       }
       start_index -= 1;
       is_verbose = true;
@@ -2021,7 +2021,7 @@
         } else if (body.breakOnUncaughtExceptions) {
           result += '* breaking on UNCAUGHT exceptions is enabled\n';
         } else {
-          result += '* all exception breakpoints are disabled\n';            
+          result += '* all exception breakpoints are disabled\n';
         }
         details.text = result;
         break;