Upstream latest DownloadController changes for android.

content/browser/android/download_controller.cc

Index: content/browser/android/download_controller.cc
diff --git a/content/browser/android/download_controller.cc b/content/browser/android/download_controller.cc
index d16784759361f421fca9a88ff40559042655ff2e..1e1be21d2c1cc1342ce637c0cc113fe3c6e475bd 100644
--- a/content/browser/android/download_controller.cc
+++ b/content/browser/android/download_controller.cc
@@ -289,8 +289,9 @@ ScopedJavaLocalRef<jobject>
   if (!web_contents)
     return ScopedJavaLocalRef<jobject>();
 
-  NOTIMPLEMENTED();
-  return ScopedJavaLocalRef<jobject>();
+  ContentViewCore* view_core = web_contents->GetContentNativeView();
+  return view_core ? view_core->GetJavaObject() :
+      ScopedJavaLocalRef<jobject>();
 }
 
 DownloadController::JavaObject* DownloadController::GetJavaObject() {
@@ -315,7 +316,7 @@ DownloadController::JavaObject* DownloadController::GetJavaObject() {
 DownloadController::DownloadInfoAndroid::DownloadInfoAndroid(
     net::URLRequest* request) {
   request->GetResponseHeaderByName("content-disposition", &content_disposition);
-  request->GetResponseHeaderByName("mime-type", &original_mime_type);
+  request->GetMimeType(&original_mime_type);
   request->extra_request_headers().GetHeader(
       net::HttpRequestHeaders::kUserAgent, &user_agent);
   GURL referer_url(request->GetSanitizedReferrer());