Lo-Fi snackbar should only be shown for the first q=low response of a page

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index a9931a7f17a5b4f3a42498e950e3837675632d2b..ff6d2998d0471974490d4390d9f02f381774ed53 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -360,6 +360,8 @@ public final class Tab implements ViewGroup.OnHierarchyChangeListener,
 
     protected Handler mHandler;
 
+    private boolean mLoFiPopupShownForPageLoad = false;
+
     private class TabContentViewClient extends ContentViewClient {
         @Override
         public void onBackgroundColorChanged(int color) {
@@ -1413,6 +1415,8 @@ public final class Tab implements ViewGroup.OnHierarchyChangeListener,
 
         mIsShowingErrorPage = showingErrorPage;
 
+        mLoFiPopupShownForPageLoad = false;
+
         updateTitle();
         removeSadTabIfPresent();
 
@@ -2581,6 +2585,17 @@ public final class Tab implements ViewGroup.OnHierarchyChangeListener,
     }
 
     /**
+     * If a Lo-Fi snackbar has not been shown yet for this page load, a Lo-Fi snackbar is shown.
+     */
+    @CalledByNative
+    public void notifyLoFiResponseReceived() {
+        if (!mLoFiPopupShownForPageLoad) {
+            mLoFiPopupShownForPageLoad = true;
+            mActivity.showLoFiPopup(this);
+        }
+    }
+
+    /**
      * Request that this tab receive focus. Currently, this function requests focus for the main
      * View (usually a ContentView).
      */