[Offline Pages] Adding user action recording for P2P sharing.

Adding user action recording for P2P sharing:
- When user shares page loaded in current tab from overflow menu.
- When user shares pages from Download Home.
- When user clicks on the reload button in the snackbar shown when an
  untrusted page is loaded.

Bug: 758690
Change-Id: I1b5c4dae5d33fb84b363ca2b26b2c56eb58efcf0
Reviewed-on: https://chromium-review.googlesource.com/1009073Reviewed-by: Peter Williamson <petewil@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Joy Ming <jming@chromium.org>
Commit-Queue: Yafei Duan <romax@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550713}

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java

@@ -347,6 +347,7 @@ public class DownloadUtils {
                         if (newFilePath != null) {
                             file = new File(newFilePath);
                         }
+                        RecordUserAction.record("OfflinePages.Sharing.SharePageFromDownloadHome");
                     }
                 } else {
                     // Share the URL, instead of the file, when the offline page sharing is

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java

@@ -325,6 +325,9 @@ public class OfflinePageTabObserver
                 RecordUserAction.record("OfflinePages.ReloadButtonClicked");
                 Tab foundTab = tabModelSelector.getTabById(tabId);
                 if (foundTab == null) return;
+                if (!OfflinePageUtils.isShowingTrustedOfflinePage(foundTab)) {
+                    RecordUserAction.record("OfflinePages.ReloadButtonClickedViewingUntrustedPage");
+                }
                 // Delegates to Tab to reload the page. Tab will send the correct header in order to
                 // load the right page.
                 foundTab.reload();

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java

@@ -17,6 +17,7 @@ import org.chromium.base.Callback;
 import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.UrlConstants;
@@ -506,6 +507,7 @@ public class OfflinePageUtils {
      */
     public static void sharePage(Activity activity, String pageUrl, String pageTitle,
             String offlinePath, File offlinePageFile, final Callback<ShareParams> shareCallback) {
+        RecordUserAction.record("OfflinePages.Sharing.SharePageFromOverflowMenu");
         AsyncTask<Void, Void, Uri> task = new AsyncTask<Void, Void, Uri>() {
             @Override
             protected Uri doInBackground(Void... v) {

tools/metrics/actions/actions.xml

@@ -13339,6 +13339,14 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="OfflinePages.ReloadButtonClickedViewingUntrustedPage">
+  <owner>romax@chromium.org</owner>
+  <description>
+    Recorded when &quot;Reload&quot; button is clicked in the snackbar that is
+    shown when an untrusted offline page is loaded.
+  </description>
+</action>
+
 <action name="OfflinePages.ReloadButtonNotClicked">
   <owner>jianli@chromium.org</owner>
   <description>
@@ -13385,6 +13393,25 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="OfflinePages.Sharing.SharePageFromDownloadHome">
+  <owner>romax@chromium.org</owner>
+  <description>
+    Recorded when the user shares offline pages from Download Home. Each page
+    will be counted once if there are multiple items being shared in a batch.
+    This will not increment if the sharing process fails at the page publishing
+    step.
+  </description>
+</action>
+
+<action name="OfflinePages.Sharing.SharePageFromOverflowMenu">
+  <owner>romax@chromium.org</owner>
+  <description>
+    Recorded when the user shares an offline page loaded in the current tab
+    through the &quot;Share...&quot; button in the overflow menu. This will not
+    increment if the sharing process fails at the page publishing step.
+  </description>
+</action>
+
 <action name="OfflinePages.ViewingOffline.EditButtonClicked">
   <obsolete>Offline pages were pulled out of bookmarks UI.</obsolete>
   <owner>jianli@chromium.org</owner>