Update WebFrameTestProxy and WebTestProxy to mostly follow Chrome style.

content/shell/renderer/test_runner/WebTask.h

Index: content/shell/renderer/test_runner/WebTask.h
diff --git a/content/shell/renderer/test_runner/WebTask.h b/content/shell/renderer/test_runner/WebTask.h
index 6c7548bb1172b5e32af115ae8e7af0282f9111df..35e5d2d60061285c29c701d3b17f32c43cd0add6 100644
--- a/content/shell/renderer/test_runner/WebTask.h
+++ b/content/shell/renderer/test_runner/WebTask.h
@@ -41,12 +41,12 @@ private:
 
 // A task containing an object pointer of class T. Derived classes should
 // override runIfValid() which in turn can safely invoke methods on the
-// m_object. The Class T must have "WebTaskList* taskList()".
+// m_object. The Class T must have "WebTaskList* mutable_task_list()".
 template<class T>
 class WebMethodTask : public WebTask {
 public:
     explicit WebMethodTask(T* object)
-        : WebTask(object->taskList())
+        : WebTask(object->mutable_task_list())
         , m_object(object)
     {
     }