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

Source/core/rendering/HitTestResult.cpp

Index: Source/core/rendering/HitTestResult.cpp
diff --git a/Source/core/rendering/HitTestResult.cpp b/Source/core/rendering/HitTestResult.cpp
index 8dc1cfc6aa57ba6daa4ef4962328dd8f98fff4e3..0feaf2437fc351ae3c6e5ce1d80e8ffdd6a20f72 100644
--- a/Source/core/rendering/HitTestResult.cpp
+++ b/Source/core/rendering/HitTestResult.cpp
@@ -261,7 +261,7 @@ Image* HitTestResult::image() const
 
     RenderObject* renderer = m_innerNonSharedNode->renderer();
     if (renderer && renderer->isImage()) {
-        RenderImage* image = static_cast<WebCore::RenderImage*>(renderer);
+        RenderImage* image = toRenderImage(renderer);
         if (image->cachedImage() && !image->cachedImage()->errorOccurred())
             return image->cachedImage()->imageForRenderer(image);
     }