feat(exception_handler): changed ExceptionHandler to use console.error instead of console.log

Closes #3812

modules/angular2/src/core/dom/browser_adapter.dart

@@ -157,6 +157,7 @@ class BrowserDomAdapter extends GenericBrowserDomAdapter {
 
   logGroup(error) {
     window.console.group(error);
+    this.logError(error);
   }
 
   logGroupEnd() {

modules/angular2/src/core/dom/browser_adapter.ts

@@ -64,13 +64,20 @@ export class BrowserDomAdapter extends GenericBrowserDomAdapter {
   }
 
   // TODO(tbosch): move this into a separate environment class once we have it
-  logError(error) { window.console.error(error); }
+  logError(error) {
+    if (window.console.error) {
+      window.console.error(error);
+    } else {
+      window.console.log(error);
+    }
+  }
 
   log(error) { window.console.log(error); }
 
   logGroup(error) {
     if (window.console.group) {
       window.console.group(error);
+      this.logError(error);
     } else {
       window.console.log(error);
     }

modules/angular2/src/core/dom/parse5_adapter.ts

@@ -52,7 +52,7 @@ export class Parse5DomAdapter extends DomAdapter {
 
   log(error) { console.log(error); }
 
-  logGroup(error) { console.log(error); }
+  logGroup(error) { console.error(error); }
 
   logGroupEnd() {}
 

modules/angular2/src/core/exception_handler.ts

@@ -5,6 +5,7 @@ import {ListWrapper, isListLikeIterable} from 'angular2/src/core/facade/collecti
 class _ArrayLogger {
   res: any[] = [];
   log(s: any): void { this.res.push(s); }
+  logError(s: any): void { this.res.push(s); }
   logGroup(s: any): void { this.res.push(s); }
   logGroupEnd(){};
 }
@@ -49,26 +50,26 @@ export class ExceptionHandler {
     this.logger.logGroup(`EXCEPTION: ${exception}`);
 
     if (isPresent(stackTrace) && isBlank(originalStack)) {
-      this.logger.log("STACKTRACE:");
-      this.logger.log(this._longStackTrace(stackTrace));
+      this.logger.logError("STACKTRACE:");
+      this.logger.logError(this._longStackTrace(stackTrace));
     }
 
     if (isPresent(reason)) {
-      this.logger.log(`REASON: ${reason}`);
+      this.logger.logError(`REASON: ${reason}`);
     }
 
     if (isPresent(originalException)) {
-      this.logger.log(`ORIGINAL EXCEPTION: ${originalException}`);
+      this.logger.logError(`ORIGINAL EXCEPTION: ${originalException}`);
     }
 
     if (isPresent(originalStack)) {
-      this.logger.log("ORIGINAL STACKTRACE:");
-      this.logger.log(this._longStackTrace(originalStack));
+      this.logger.logError("ORIGINAL STACKTRACE:");
+      this.logger.logError(this._longStackTrace(originalStack));
     }
 
     if (isPresent(context)) {
-      this.logger.log("ERROR CONTEXT:");
-      this.logger.log(context);
+      this.logger.logError("ERROR CONTEXT:");
+      this.logger.logError(context);
     }
 
     this.logger.logGroupEnd();

modules/angular2/src/web_workers/worker/application_common.ts

@@ -71,6 +71,7 @@ var _rootBindings = [bind(Reflector).toValue(reflector)];
 
 class PrintLogger {
   log = print;
+  logError = print;
   logGroup = print;
   logGroupEnd() {}
 }

modules/angular2/test/core/application_spec.ts

@@ -69,6 +69,7 @@ class HelloRootDirectiveIsNotCmp {
 class _ArrayLogger {
   res: any[] = [];
   log(s: any): void { this.res.push(s); }
+  logError(s: any): void { this.res.push(s); }
   logGroup(s: any): void { this.res.push(s); }
   logGroupEnd(){};
 }

modules/angular2/test/router/route_config_spec.ts

@@ -33,6 +33,7 @@ import {MockLocationStrategy} from 'angular2/src/mock/mock_location_strategy';
 class _ArrayLogger {
   res: any[] = [];
   log(s: any): void { this.res.push(s); }
+  logError(s: any): void { this.res.push(s); }
   logGroup(s: any): void { this.res.push(s); }
   logGroupEnd(){};
 }