Implement section 1.2 of the manual permissions tests suite

https://testtracker.googleplex.com/testplans/details/33023?revision=10
The link above describes the currently existing manual tests related
to the permission prompts. As part of the review process, I've
implemented the tests from section 1.2 all of which could be automated
and are related to the "protected content" settings page.

Bug: 1063164
Change-Id: Icf47d0b48d3ff9135419ad9902bee965836e8180
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2225407
Commit-Queue: Andy Paicu <andypaicu@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776880}

chrome/android/BUILD.gn

@@ -1086,6 +1086,7 @@ android_library("chrome_test_java") {
     "//content/test/data/browsing_data/",
     "//content/test/data/android/authenticator.html",
     "//content/test/data/android/auto_downloads_permissions.html",
+    "//content/test/data/android/eme_permissions.html",
     "//content/test/data/android/geolocation.html",
     "//content/test/data/android/installedapp.html",
     "//content/test/data/android/media_permissions.html",

chrome/android/javatests/src/org/chromium/chrome/browser/site_settings/SiteSettingsTest.java

@@ -10,6 +10,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
 import android.support.test.InstrumentationRegistry;
+import android.support.test.filters.MediumTest;
 import android.support.test.filters.SmallTest;
 import android.util.Pair;
 
@@ -97,6 +98,9 @@ public class SiteSettingsTest {
     }
 
     private void initializeUpdateWaiter(final boolean expectGranted) {
+        if (mPermissionUpdateWaiter != null) {
+            mPermissionRule.getActivity().getActivityTab().removeObserver(mPermissionUpdateWaiter);
+        }
         Tab tab = mPermissionRule.getActivity().getActivityTab();
 
         mPermissionUpdateWaiter = new PermissionUpdateWaiter(
@@ -1245,4 +1249,65 @@ public class SiteSettingsTest {
 
         settingsActivity.finish();
     }
+
+    @Test
+    @MediumTest
+    @Feature({"Preferences"})
+    public void testProtectedContentDefaultOption() throws Exception {
+        initializeUpdateWaiter(true /* expectGranted */);
+        mPermissionRule.runNoPromptTest(mPermissionUpdateWaiter,
+                "/content/test/data/android/eme_permissions.html", "requestEME()", 0, true, true);
+    }
+
+    @Test
+    @MediumTest
+    @Feature({"Preferences"})
+    public void testProtectedContentAskAllow() throws Exception {
+        setGlobalTriStateToggleForCategory(
+                SiteSettingsCategory.Type.PROTECTED_MEDIA, ContentSettingValues.ASK);
+
+        initializeUpdateWaiter(true /* expectGranted */);
+        mPermissionRule.runAllowTest(mPermissionUpdateWaiter,
+                "/content/test/data/android/eme_permissions.html", "requestEME()", 0, true, true);
+    }
+
+    @Test
+    @MediumTest
+    @Feature({"Preferences"})
+    public void testProtectedContentAskBlocked() throws Exception {
+        setGlobalTriStateToggleForCategory(
+                SiteSettingsCategory.Type.PROTECTED_MEDIA, ContentSettingValues.ASK);
+
+        initializeUpdateWaiter(false /* expectGranted */);
+        mPermissionRule.runDenyTest(mPermissionUpdateWaiter,
+                "/content/test/data/android/eme_permissions.html", "requestEME()", 0, true, true);
+    }
+
+    @Test
+    @MediumTest
+    @Feature({"Preferences"})
+    public void testProtectedContentBlocked() throws Exception {
+        setGlobalTriStateToggleForCategory(
+                SiteSettingsCategory.Type.PROTECTED_MEDIA, ContentSettingValues.BLOCK);
+
+        initializeUpdateWaiter(false /* expectGranted */);
+        mPermissionRule.runNoPromptTest(mPermissionUpdateWaiter,
+                "/content/test/data/android/eme_permissions.html", "requestEME()", 0, true, true);
+    }
+
+    @Test
+    @MediumTest
+    @Feature({"Preferences"})
+    public void testProtectedContentAllowThenBlock() throws Exception {
+        initializeUpdateWaiter(true /* expectGranted */);
+        mPermissionRule.runNoPromptTest(mPermissionUpdateWaiter,
+                "/content/test/data/android/eme_permissions.html", "requestEME()", 0, true, true);
+
+        setGlobalTriStateToggleForCategory(
+                SiteSettingsCategory.Type.PROTECTED_MEDIA, ContentSettingValues.BLOCK);
+
+        initializeUpdateWaiter(false /* expectGranted */);
+        mPermissionRule.runNoPromptTest(mPermissionUpdateWaiter,
+                "/content/test/data/android/eme_permissions.html", "requestEME()", 0, true, true);
+    }
 }

content/test/data/android/eme_permissions.html

+<html>
+    <script>
+        var functionToRun = '';
+        function runFunctionOnClick() {
+            eval(functionToRun);
+        }
+
+        window.addEventListener('load', () => {
+            window.addEventListener('click', runFunctionOnClick);
+        });
+
+        function requestEME() {
+            var capabilities = [{ contentType: 'audio/webm; codecs="opus"' }];
+            navigator.requestMediaKeySystemAccess(
+                "com.widevine.alpha", [{
+                    distinctiveIdentifier: "required",
+                    persistentState: "required",
+                    audioCapabilities: capabilities,
+                    label: "'distinctiveIdentifier' and 'persistentState' required"
+                }]
+            ).then(
+                _ => {
+                    document.title = "Granted"; document.body.innerText = "Granted";
+                },
+                _ => {
+                    document.title = "Denied"; document.body.innerText = "Denied";
+                }
+            );
+        }
+    </script>
+<body>
+    This page tests for EME permissions with user gesture
+</body>
+</html>
\ No newline at end of file