Update content/ to use WeakPtr<T>::get() instead of implicit "operator T*"

content/browser/tracing/tracing_ui.cc

Index: content/browser/tracing/tracing_ui.cc
diff --git a/content/browser/tracing/tracing_ui.cc b/content/browser/tracing/tracing_ui.cc
index e7f1a7d198ba54f88edb735ad847bf6a2dd0fee8..08bab8b2f4f43be42592c953947b8d6c8dc8d338 100644
--- a/content/browser/tracing/tracing_ui.cc
+++ b/content/browser/tracing/tracing_ui.cc
@@ -124,13 +124,13 @@ class TaskProxy : public base::RefCountedThreadSafe<TaskProxy> {
       : handler_(handler) {}
   void LoadTraceFileCompleteProxy(string16* file_contents,
                                   const base::FilePath& path) {
-    if (handler_)
+    if (handler_.get())
       handler_->LoadTraceFileComplete(file_contents, path);
     delete file_contents;
   }
 
   void SaveTraceFileCompleteProxy() {
-    if (handler_)
+    if (handler_.get())
       handler_->SaveTraceFileComplete();
   }