Add InfoBar delegate for previews

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc

Index: chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc
diff --git a/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc b/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc
index a75e05fc74d1e1923593810a0a1e0ccdfe57b1d3..64825b69d06772076359fca589ffe242bffda671 100644
--- a/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc
+++ b/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc
@@ -11,6 +11,7 @@
 #include "build/build_config.h"
 #include "chrome/browser/net/spdyproxy/chrome_data_use_group_provider.h"
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
+#include "chrome/browser/previews/previews_infobar_delegate.h"
 #include "chrome/common/channel_info.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/pref_names.h"
@@ -25,7 +26,6 @@
 
 #if defined(OS_ANDROID)
 #include "base/android/build_info.h"
-#include "chrome/browser/android/tab_android.h"
 #endif
 
 namespace content {
@@ -38,16 +38,11 @@ namespace {
 
 // For Android builds, notifies the TabAndroid associated with |web_contents|

[bengr, 2016/08/25 23:26:18]

Is this still accurate? You removed references in code to TabAndroid.

[megjablon, 2016/08/26 22:47:30]

Done.

 // that a Lo-Fi response has been received. The TabAndroid then handles showing
-// Lo-Fi UI if this is the first Lo-Fi response for a page load. |is_preview|
-// indicates whether the response was a Lo-Fi preview response.
-void OnLoFiResponseReceivedOnUI(content::WebContents* web_contents,
-                                bool is_preview) {
+// Lo-Fi UI if this is the first Lo-Fi response for a page load.
+void OnLoFiResponseReceivedOnUI(content::WebContents* web_contents) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-#if defined(OS_ANDROID)
-  TabAndroid* tab = TabAndroid::FromWebContents(web_contents);
-  if (tab)
-    tab->OnLoFiResponseReceived(is_preview);
-#endif
+  PreviewsInfoBarDelegate::Create(web_contents,
+                                  PreviewsInfoBarDelegate::LOFI);
 }
 
 } // namespace