Refactoring: Simplify DocumentWriter by reorganizing its lifetime.

Source/core/inspector/InspectorOverlay.cpp

Index: Source/core/inspector/InspectorOverlay.cpp
diff --git a/Source/core/inspector/InspectorOverlay.cpp b/Source/core/inspector/InspectorOverlay.cpp
index cd17b9d56dbf64e4e22d7a2628d574f9dbdae327..5964d5555f32da653f5af952cdd3fe61a9231081 100644
--- a/Source/core/inspector/InspectorOverlay.cpp
+++ b/Source/core/inspector/InspectorOverlay.cpp
@@ -605,7 +605,7 @@ Page* InspectorOverlay::overlayPage()
     ASSERT(loader->activeDocumentLoader());
     DocumentWriter* writer = loader->activeDocumentLoader()->beginWriting("text/html", "UTF-8");
     writer->addData(reinterpret_cast<const char*>(InspectorOverlayPage_html), sizeof(InspectorOverlayPage_html));
-    writer->end();
+    loader->activeDocumentLoader()->endWriting(writer);
     v8::HandleScope handleScope;
     v8::Handle<v8::Context> frameContext = frame->script()->currentWorldContext();
     v8::Context::Scope contextScope(frameContext);