Move DownloadControllerAndroid from content/ to chrome/

chrome/browser/android/tab_android.cc

Index: chrome/browser/android/tab_android.cc
diff --git a/chrome/browser/android/tab_android.cc b/chrome/browser/android/tab_android.cc
index 17a4440f4b5c94931910ae28b6822272d0009592..c288e6942e86113d04af4a72ddf29f68d970cb9c 100644
--- a/chrome/browser/android/tab_android.cc
+++ b/chrome/browser/android/tab_android.cc
@@ -14,6 +14,7 @@
 #include "base/trace_event/trace_event.h"
 #include "cc/layers/layer.h"
 #include "chrome/browser/android/compositor/tab_content_manager.h"
+#include "chrome/browser/android/download/chrome_download_delegate.h"
 #include "chrome/browser/android/metrics/uma_utils.h"
 #include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
 #include "chrome/browser/android/offline_pages/offline_page_utils.h"
@@ -379,6 +380,7 @@ void TabAndroid::InitWebContents(
     jboolean incognito,
     const JavaParamRef<jobject>& jcontent_view_core,
     const JavaParamRef<jobject>& jweb_contents_delegate,
+    const JavaParamRef<jobject>& jdownload_delegate,
     const JavaParamRef<jobject>& jcontext_menu_populator) {
   content::ContentViewCore* content_view_core =
       content::ContentViewCore::GetNativeContentViewCore(env,
@@ -399,6 +401,8 @@ void TabAndroid::InitWebContents(
       SetViewAndroid(content_view_core);
   CoreTabHelper::FromWebContents(web_contents())->set_delegate(this);
   SearchTabHelper::FromWebContents(web_contents())->set_delegate(this);
+  ChromeDownloadDelegate::FromWebContents(web_contents())->
+      Init(env, jdownload_delegate);
   web_contents_delegate_.reset(
       new chrome::android::TabWebContentsDelegateAndroid(
           env, jweb_contents_delegate));