Cleanup: Start using toFoo methods as part of newly adopted coding guideline.

Source/core/html/HTMLMeterElement.cpp

Index: Source/core/html/HTMLMeterElement.cpp
diff --git a/Source/core/html/HTMLMeterElement.cpp b/Source/core/html/HTMLMeterElement.cpp
index 0944dcfca99ade4ad5465599fef232d71b9c867a..738aea3ee638926d583d28540e2532514514fa3f 100644
--- a/Source/core/html/HTMLMeterElement.cpp
+++ b/Source/core/html/HTMLMeterElement.cpp
@@ -214,11 +214,11 @@ void HTMLMeterElement::didElementStateChange()
 RenderMeter* HTMLMeterElement::renderMeter() const
 {
     if (renderer() && renderer()->isMeter())
-        return static_cast<RenderMeter*>(renderer());
+        return toRenderMeter(renderer());
 
     RenderObject* renderObject = userAgentShadowRoot()->firstChild()->renderer();
     ASSERT(!renderObject || renderObject->isMeter());
-    return static_cast<RenderMeter*>(renderObject);
+    return toRenderMeter(renderObject);
 }
 
 void HTMLMeterElement::didAddUserAgentShadowRoot(ShadowRoot* root)