Simplify BrowserContext by removing redundant methods.

chrome/test/base/testing_profile.h

Index: chrome/test/base/testing_profile.h
diff --git a/chrome/test/base/testing_profile.h b/chrome/test/base/testing_profile.h
index f42fb81832f4b356749b8650d5a57ae575632730..97b07d57c6e24bd69a0c20cc6aec49a3b63832d0 100644
--- a/chrome/test/base/testing_profile.h
+++ b/chrome/test/base/testing_profile.h
@@ -222,7 +222,6 @@ class TestingProfile : public Profile {
   scoped_refptr<base::SequencedTaskRunner> GetIOTaskRunner() override;
   bool IsOffTheRecord() const override;
   content::DownloadManagerDelegate* GetDownloadManagerDelegate() override;
-  net::URLRequestContextGetter* GetRequestContext() override;
   content::ResourceContext* GetResourceContext() override;
   content::BrowserPluginGuestManager* GetGuestManager() override;
   storage::SpecialStoragePolicy* GetSpecialStoragePolicy() override;
@@ -286,6 +285,7 @@ class TestingProfile : public Profile {
   net::URLRequestContextGetter* GetMediaRequestContext() override;
   net::URLRequestContextGetter* GetMediaRequestContextForRenderProcess(
       int renderer_child_id) override;
+  net::URLRequestContextGetter* GetRequestContext() override;
   net::URLRequestContextGetter* GetRequestContextForExtensions() override;
   net::URLRequestContextGetter* GetMediaRequestContextForStoragePartition(
       const base::FilePath& partition_path,