Merge branch '2.8' into 3.1

* 2.8:
  Fix edge case with StreamedResponse where headers are sent twice
  removed usage of Twig_Compiler::addIndentation
  A decorated service should not keep the autowiring types
  merge tags instead of completely replacing them

src/Symfony/Bridge/Twig/Node/DumpNode.php

@@ -65,7 +65,7 @@ class DumpNode extends \Twig_Node
                 ->write('\Symfony\Component\VarDumper\VarDumper::dump(array('."\n")
                 ->indent();
             foreach ($values as $node) {
-                $compiler->addIndentation();
+                $compiler->write('');
                 if ($node->hasAttribute('name')) {
                     $compiler
                         ->string($node->getAttribute('name'))

src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php

@@ -52,10 +52,12 @@ class DecoratorServicePass implements CompilerPassInterface
                 $container->setAlias($renamedId, new Alias((string) $alias, false));
             } else {
                 $decoratedDefinition = $container->getDefinition($inner);
-                $definition->setTags($decoratedDefinition->getTags(), $definition->getTags());
+                $definition->setTags(array_merge($decoratedDefinition->getTags(), $definition->getTags()));
+                $definition->setAutowiringTypes(array_merge($decoratedDefinition->getAutowiringTypes(), $definition->getAutowiringTypes()));
                 $public = $decoratedDefinition->isPublic();
                 $decoratedDefinition->setPublic(false);
                 $decoratedDefinition->setTags(array());
+                $decoratedDefinition->setAutowiringTypes(array());
                 $container->setDefinition($renamedId, $decoratedDefinition);
             }
 

src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php

@@ -129,17 +129,39 @@ class DecoratorServicePassTest extends \PHPUnit_Framework_TestCase
         $container = new ContainerBuilder();
         $container
             ->register('foo')
-            ->setTags(array('name' => 'bar'))
+            ->setTags(array('bar' => array('attr' => 'baz')))
         ;
         $container
             ->register('baz')
+            ->setTags(array('foobar' => array('attr' => 'bar')))
             ->setDecoratedService('foo')
         ;
 
         $this->process($container);
 
         $this->assertEmpty($container->getDefinition('baz.inner')->getTags());
-        $this->assertEquals(array('name' => 'bar'), $container->getDefinition('baz')->getTags());
+        $this->assertEquals(array('bar' => array('attr' => 'baz'), 'foobar' => array('attr' => 'bar')), $container->getDefinition('baz')->getTags());
+    }
+
+    public function testProcessMergesAutowiringTypesInDecoratingDefinitionAndRemoveThemFromDecoratedDefinition()
+    {
+        $container = new ContainerBuilder();
+
+        $container
+            ->register('parent')
+            ->addAutowiringType('Bar')
+        ;
+
+        $container
+            ->register('child')
+            ->setDecoratedService('parent')
+            ->addAutowiringType('Foo')
+        ;
+
+        $this->process($container);
+
+        $this->assertEquals(array('Bar', 'Foo'), $container->getDefinition('child')->getAutowiringTypes());
+        $this->assertEmpty($container->getDefinition('child.inner')->getAutowiringTypes());
     }
 
     protected function process(ContainerBuilder $container)

src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php

@@ -337,8 +337,11 @@ class ResolveDefinitionTemplatesPassTest extends \PHPUnit_Framework_TestCase
 
         $this->process($container);
 
-        $def = $container->getDefinition('child');
+        $childDef = $container->getDefinition('child');
-        $this->assertEquals(array('Foo', 'Bar'), $def->getAutowiringTypes());
+        $this->assertEquals(array('Foo', 'Bar'), $childDef->getAutowiringTypes());
+
+        $parentDef = $container->getDefinition('parent');
+        $this->assertSame(array('Foo'), $parentDef->getAutowiringTypes());
     }
 
     public function testProcessResolvesAliases()

src/Symfony/Component/HttpFoundation/StreamedResponse.php

@@ -28,6 +28,7 @@ class StreamedResponse extends Response
 {
     protected $callback;
     protected $streamed;
+    private $headersSent;
 
     /**
      * Constructor.
@@ -44,6 +45,7 @@ class StreamedResponse extends Response
             $this->setCallback($callback);
         }
         $this->streamed = false;
+        $this->headersSent = false;
     }
 
     /**
@@ -70,6 +72,22 @@ class StreamedResponse extends Response
         $this->callback = $callback;
     }
 
+    /**
+     * {@inheritdoc}
+     *
+     * This method only sends the headers once.
+     */
+    public function sendHeaders()
+    {
+        if ($this->headersSent) {
+            return;
+        }
+
+        $this->headersSent = true;
+
+        parent::sendHeaders();
+    }
+
     /**
      * {@inheritdoc}
      *