Improve TDI render process naming in the task manager.

chrome/browser/task_manager/providers/web_contents/subframe_task.h

Index: chrome/browser/task_manager/providers/web_contents/subframe_task.h
diff --git a/chrome/browser/task_manager/providers/web_contents/subframe_task.h b/chrome/browser/task_manager/providers/web_contents/subframe_task.h
index 7cf05a04a2a51dcd000046a4f73943b257d15e99..a861ca936662159cd96c879743b6b8d9ceb5d631 100644
--- a/chrome/browser/task_manager/providers/web_contents/subframe_task.h
+++ b/chrome/browser/task_manager/providers/web_contents/subframe_task.h
@@ -10,6 +10,7 @@
 
 namespace content {
 class RenderFrameHost;
+class SiteInstance;
 class WebContents;
 }  // namespace content
 
@@ -33,8 +34,13 @@ class SubframeTask : public RendererTask {
   Task* GetParentTask() const override;
 
  private:
+  base::string16 GetTitle();
+
+  content::SiteInstance* site_instance_;
+
   // The task for the main frame of this WebContents.
   RendererTask* main_task_;
+
   DISALLOW_COPY_AND_ASSIGN(SubframeTask);
 };