fix(errors): [2/2] Rename Exception to Error; remove from public API

BREAKING CHANGE:

Exceptions are no longer part of the public API. We don't expect that anyone should be referring to the Exception types.

ExceptionHandler.call(exception: any, stackTrace?: any, reason?: string): void;
change to:
ErrorHandler.handleError(error: any): void;

modules/playground/e2e_test/sourcemap/sourcemap_spec.ts

@@ -52,7 +52,7 @@ describe('sourcemaps', function() {
                                 encoding: 'UTF-8'
                               }).split('\n');
       expect(sourceCodeLines[originalPosition.line - 1])
-          .toMatch(/throw new BaseException\(\'Sourcemap test\'\)/);
+          .toMatch(/throw new Error\(\'Sourcemap test\'\)/);
     });
   });
 });

modules/playground/src/sourcemap/index.ts

@@ -7,7 +7,6 @@
  */
 
 import {Component, NgModule} from '@angular/core';
-import {BaseException} from '@angular/core';
 import {BrowserModule} from '@angular/platform-browser';
 import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
 
@@ -17,7 +16,7 @@ import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
            <button class="errorButton" (click)="createError()">create error</button>`
 })
 export class ErrorComponent {
-  createError(): void { throw new BaseException('Sourcemap test'); }
+  createError(): void { throw new Error('Sourcemap test'); }
 }
 
 @NgModule({declarations: [ErrorComponent], bootstrap: [ErrorComponent], imports: [BrowserModule]})