Clean up Android DownloadManager code as most download now go through Chrome Network stack

chrome/browser/android/download/chrome_download_delegate.cc

Index: chrome/browser/android/download/chrome_download_delegate.cc
diff --git a/chrome/browser/android/download/chrome_download_delegate.cc b/chrome/browser/android/download/chrome_download_delegate.cc
index 256e6f4573377237d2ba7e9d6a7b5d36c6f33d4e..974663c8e9682cfacd171b069e0420ab8f132a36 100644
--- a/chrome/browser/android/download/chrome_download_delegate.cc
+++ b/chrome/browser/android/download/chrome_download_delegate.cc
@@ -142,49 +142,11 @@ void ChromeDownloadDelegate::SetJavaRef(JNIEnv* env, jobject jobj) {
   java_ref_ = env->NewGlobalRef(jobj);
 }
 
-void ChromeDownloadDelegate::RequestHTTPGetDownload(
-    const std::string& url,
-    const std::string& user_agent,
-    const std::string& content_disposition,
-    const std::string& mime_type,
-    const std::string& cookie,
-    const std::string& referer,
-    const base::string16& file_name,
-    int64_t content_length,
-    bool has_user_gesture,
-    bool must_download) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  ScopedJavaLocalRef<jstring> jurl =
-      ConvertUTF8ToJavaString(env, url);
-  ScopedJavaLocalRef<jstring> juser_agent =
-      ConvertUTF8ToJavaString(env, user_agent);
-  ScopedJavaLocalRef<jstring> jcontent_disposition =
-      ConvertUTF8ToJavaString(env, content_disposition);
-  ScopedJavaLocalRef<jstring> jmime_type =
-      ConvertUTF8ToJavaString(env, mime_type);
-  ScopedJavaLocalRef<jstring> jcookie =
-      ConvertUTF8ToJavaString(env, cookie);
-  ScopedJavaLocalRef<jstring> jreferer =
-      ConvertUTF8ToJavaString(env, referer);
-
-  // net::GetSuggestedFilename will fallback to "download" as filename.
-  ScopedJavaLocalRef<jstring> jfilename =
-      base::android::ConvertUTF16ToJavaString(env, file_name);
-  Java_ChromeDownloadDelegate_requestHttpGetDownload(
-      env, java_ref_, jurl, juser_agent, jcontent_disposition, jmime_type,
-      jcookie, jreferer, has_user_gesture, jfilename, content_length,
-      must_download);
-}
-
-void ChromeDownloadDelegate::OnDownloadStarted(const std::string& filename,
-                                               const std::string& mime_type) {
+void ChromeDownloadDelegate::OnDownloadStarted(const std::string& filename) {
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jstring> jfilename = ConvertUTF8ToJavaString(
       env, filename);
-  ScopedJavaLocalRef<jstring> jmime_type =
-      ConvertUTF8ToJavaString(env, mime_type);
-  Java_ChromeDownloadDelegate_onDownloadStarted(env, java_ref_, jfilename,
-                                                jmime_type);
+  Java_ChromeDownloadDelegate_onDownloadStarted(env, java_ref_, jfilename);
 }
 
 void ChromeDownloadDelegate::OnDangerousDownload(const std::string& filename,