Switch to use download GUID to indentify download items

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 5fa5db177bb0531c598a2efa75c6ab73265374ad..8ce3faccc1eb7f6b6e97ab29b090261dd205c89e 100644
--- a/chrome/browser/android/download/chrome_download_delegate.cc
+++ b/chrome/browser/android/download/chrome_download_delegate.cc
@@ -48,14 +48,17 @@ static jboolean IsDownloadDangerous(JNIEnv* env,
 }
 
 // Called when a dangerous download is validated.
-static void DangerousDownloadValidated(JNIEnv* env,
-                                       const JavaParamRef<jclass>& clazz,
-                                       const JavaParamRef<jobject>& tab,
-                                       jint download_id,
-                                       jboolean accept) {
+static void DangerousDownloadValidated(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz,
+    const JavaParamRef<jobject>& tab,
+    const JavaParamRef<jstring>& jdownload_guid,
+    jboolean accept) {
+  std::string download_guid =
+      base::android::ConvertJavaStringToUTF8(env, jdownload_guid);
   TabAndroid* tab_android = TabAndroid::GetNativeTab(env, tab);
   DownloadControllerAndroid::Get()->DangerousDownloadValidated(
-      tab_android->web_contents(), download_id, accept);
+      tab_android->web_contents(), download_guid, accept);
 }
 
 // static