Remove BitmapFetcher's dependency on Profile

chrome/browser/bitmap_fetcher.h

Index: chrome/browser/bitmap_fetcher.h
diff --git a/chrome/browser/bitmap_fetcher.h b/chrome/browser/bitmap_fetcher.h
index 739c8ec95c79bc4d5802045e423c4bf2fb072079..b468c038b8dc0162a32d1146d7da0fd2c545dfe6 100644
--- a/chrome/browser/bitmap_fetcher.h
+++ b/chrome/browser/bitmap_fetcher.h
@@ -14,10 +14,9 @@
 
 namespace net {
 class URLFetcher;
+class URLRequestContextGetter;
 }  // namespace net
 
-class Profile;
-
 namespace chrome {
 
 // Asynchrounously fetches an image from the given URL and returns the
@@ -34,7 +33,7 @@ class BitmapFetcher : public net::URLFetcherDelegate,
   // asynchronously when done.  Start may be called more than once in some
   // cases.  If so, subsequent starts will be ignored since the operation is
   // already in progress.
-  void Start(Profile* profile);
+  void Start(net::URLRequestContextGetter* request_context);
 
   // Methods inherited from URLFetcherDelegate