Stop RenderProgress timer on destruction.

Source/core/rendering/RenderProgress.cpp

Index: Source/core/rendering/RenderProgress.cpp
diff --git a/Source/core/rendering/RenderProgress.cpp b/Source/core/rendering/RenderProgress.cpp
index 358a909401e1b31932c334f7f33c28fc2558bf30..76aa9965d8f333891ac5221bf5c6fdb02d3710b8 100644
--- a/Source/core/rendering/RenderProgress.cpp
+++ b/Source/core/rendering/RenderProgress.cpp
@@ -44,6 +44,15 @@ RenderProgress::~RenderProgress()
 {
 }
 
+void RenderProgress::destroy()
+{
+    if (m_animating) {
+        m_animationTimer.stop();
+        m_animating = false;
+    }
+    RenderBlockFlow::destroy();
+}
+
 void RenderProgress::updateFromElement()
 {
     HTMLProgressElement* element = progressElement();