Don't expose webshare from the browser when the origin trial disables it.

chrome/android/javatests/src/org/chromium/chrome/browser/WebShareTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/WebShareTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/WebShareTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/WebShareTest.java
index bae64b0fae788ccd6f669af7ce5322b13859e266..8e2056ab512abbc091d59ca007ac64b65cf67c5e 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/WebShareTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/WebShareTest.java
@@ -117,6 +117,20 @@ public class WebShareTest extends ChromeActivityTestCaseBase<ChromeActivity> {
     }
 
     /**
+     * Verify that WebShare fails if the origin trial is disabled.
+     * @throws Exception
+     */
+    @MediumTest
+    @CommandLineFlags.Add({
+            "enable-blink-features=WebShare", "origin-trial-disabled-features=WebShare"})
+    @Feature({"WebShare"})
+    public void testWebShareOriginTrialDisabled() throws Exception {
+        loadUrl(mUrl);
+        singleClickView(mTab.getView());
+        assertEquals("Fail: SecurityError: WebShare is disabled.", mUpdateWaiter.waitForUpdate());
+    }
+
+    /**
      * Verify WebShare fails if share is called from a user gesture, and canceled.
      * @throws Exception
      */