Remove unnecessary method from Browser object.

TBR=sky@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1136363002

Cr-Commit-Position: refs/heads/master@{#329585}

mandoline/ui/browser/browser.cc

@@ -21,18 +21,13 @@ Browser::Browser()
       content_(nullptr),
       omnibox_(nullptr),
       navigator_host_(this),
-      ui_(nullptr),
-      weak_factory_(this) {
+      ui_(nullptr) {
   exposed_services_impl_.AddService(this);
 }
 
 Browser::~Browser() {
 }
 
-base::WeakPtr<Browser> Browser::GetWeakPtr() {
-  return weak_factory_.GetWeakPtr();
-}
-
 void Browser::ReplaceContentWithURL(const mojo::String& url) {
   Embed(url, nullptr, nullptr);
 }

mandoline/ui/browser/browser.h

@@ -5,7 +5,6 @@
 #ifndef MANDOLINE_UI_BROWSER_BROWSER_H_
 #define MANDOLINE_UI_BROWSER_BROWSER_H_
 
-#include "base/memory/weak_ptr.h"
 #include "components/view_manager/public/cpp/view_manager.h"
 #include "components/view_manager/public/cpp/view_manager_delegate.h"
 #include "components/window_manager/window_manager_app.h"
@@ -34,8 +33,6 @@ class Browser : public mojo::ApplicationDelegate,
   Browser();
   ~Browser() override;
 
-  base::WeakPtr<Browser> GetWeakPtr();
-
   void ReplaceContentWithURL(const mojo::String& url);
 
   mojo::View* content() { return content_; }
@@ -95,8 +92,6 @@ class Browser : public mojo::ApplicationDelegate,
 
   scoped_ptr<BrowserUI> ui_;
 
-  base::WeakPtrFactory<Browser> weak_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };