Remove BitmapFetcher's dependency on Profile

chrome/browser/android/banners/app_banner_manager.cc

Index: chrome/browser/android/banners/app_banner_manager.cc
diff --git a/chrome/browser/android/banners/app_banner_manager.cc b/chrome/browser/android/banners/app_banner_manager.cc
index fdc45aa4ce67390df06e67be1a7dec24ab1a5246..704c1ac913b29f256d9405af988002b344d5b657 100644
--- a/chrome/browser/android/banners/app_banner_manager.cc
+++ b/chrome/browser/android/banners/app_banner_manager.cc
@@ -132,7 +132,7 @@ bool AppBannerManager::FetchIcon(JNIEnv* env,
   Profile* profile =
       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
   fetcher_.reset(new chrome::BitmapFetcher(GURL(image_url), this));
-  fetcher_.get()->Start(profile);
+  fetcher_.get()->Start(profile->GetRequestContext());
   return true;
 }