Create entry to PWSharing through ShareHelper

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
index 1e8816779e1bb3be30af768b3f5727e21768e25a..2e4e58f635d227f9f8c6eea21c1e1409eb43a0ea 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
@@ -97,6 +97,8 @@ import org.chromium.chrome.browser.offlinepages.OfflinePageUtils;
 import org.chromium.chrome.browser.omaha.UpdateMenuItemHelper;
 import org.chromium.chrome.browser.pageinfo.WebsiteSettingsPopup;
 import org.chromium.chrome.browser.partnercustomizations.PartnerBrowserCustomizations;
+import org.chromium.chrome.browser.physicalweb.PhysicalWeb;
+import org.chromium.chrome.browser.physicalweb.PhysicalWebShareActivity;
 import org.chromium.chrome.browser.preferences.ChromePreferenceManager;
 import org.chromium.chrome.browser.preferences.PrefServiceBridge;
 import org.chromium.chrome.browser.preferences.PreferencesLauncher;
@@ -1139,10 +1141,9 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         final Tab currentTab = getActivityTab();
         if (currentTab == null) return;
 
-        PrintingController printingController = PrintingControllerImpl.getInstance();
-        if (printingController != null && !currentTab.isNativePage() && !printingController.isBusy()
-                && PrefServiceBridge.getInstance().isPrintingEnabled()) {
-            PrintShareActivity.enablePrintShareOption(this, new Runnable() {
+        List<Class> options = getAdditionalShareOptionsList(currentTab);
+        if (!options.isEmpty()) {
+            ShareHelper.enableOptions(this, options, new Runnable() {
                 @Override
                 public void run() {
                     triggerShare(currentTab, shareDirectly, isIncognito);
@@ -1154,6 +1155,25 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         triggerShare(currentTab, shareDirectly, isIncognito);
     }
 
+    public static List<Class> getAdditionalShareOptionsList(Tab currentTab) {

[cco3, 2017/02/02 00:58:57]

How do you know that this will give you the same values when you call it to
register and when you call it to unregister?  Also, it seems a little dirty for
the specific share activities to call this method...let's try to find a way
around that.

[iankc, 2017/02/02 01:52:24]

Done.

+        List<Class> options = new ArrayList<Class>(2);
+
+        // Check and handle Printing option.
+        PrintingController printingController = PrintingControllerImpl.getInstance();
+        if (printingController != null && (currentTab == null || !currentTab.isNativePage())
+                && !printingController.isBusy()
+                && PrefServiceBridge.getInstance().isPrintingEnabled()) {
+            options.add(PrintShareActivity.class);
+        }
+
+        // Check and handle Physical Web Sharing.
+        if (PhysicalWeb.sharingIsEnabled()
+                && Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            options.add(PhysicalWebShareActivity.class);
+        }
+        return options;
+    }
+
     private void triggerShare(
             final Tab currentTab, final boolean shareDirectly, boolean isIncognito) {
         final Activity mainActivity = this;