Update getDisplayMediaTests on macOS 10.15

Always expect success in getDisplayMedia with the fake UI.

Bug: 1002984
Change-Id: If576d6cc26fff459732a5740a48c525fcbad8aca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1821719
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Armando Miraglia <armax@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699353}

chrome/browser/media/webrtc/webrtc_getdisplaymedia_browsertest.cc

@@ -37,7 +37,8 @@ class WebRtcGetDisplayMediaBrowserTest : public WebRtcTestBase {
   }
 
   void RunGetDisplayMedia(content::WebContents* tab,
-                          const std::string& constraints) {
+                          const std::string& constraints,
+                          bool is_fake_ui = false) {
     std::string result;
     EXPECT_TRUE(content::ExecuteScriptAndExtractString(
         tab->GetMainFrame(),
@@ -45,9 +46,11 @@ class WebRtcGetDisplayMediaBrowserTest : public WebRtcTestBase {
         &result));
 #if defined(OS_MACOSX)
     // Starting from macOS 10.15, screen capture requires system permissions
-    // that are disabled by default.
-    EXPECT_EQ(result, base::mac::IsAtMostOS10_14() ? "getdisplaymedia-success"
-                                                   : "getdisplaymedia-failure");
+    // that are disabled by default. The permission is reported as granted
+    // if the fake UI is used.
+    EXPECT_EQ(result, base::mac::IsAtMostOS10_14() || is_fake_ui
+                          ? "getdisplaymedia-success"
+                          : "getdisplaymedia-failure");
 #else
     EXPECT_EQ(result, "getdisplaymedia-success");
 #endif
@@ -133,7 +136,7 @@ IN_PROC_BROWSER_TEST_P(WebRtcGetDisplayMediaBrowserTestWithFakeUI,
 
   content::WebContents* tab = OpenTestPageInNewTab(kMainHtmlPage);
   std::string constraints("{video:true}");
-  RunGetDisplayMedia(tab, constraints);
+  RunGetDisplayMedia(tab, constraints, /*is_fake_ui=*/true);
 
   std::string result;
   EXPECT_TRUE(content::ExecuteScriptAndExtractString(
@@ -155,7 +158,7 @@ IN_PROC_BROWSER_TEST_P(WebRtcGetDisplayMediaBrowserTestWithFakeUI,
 
   content::WebContents* tab = OpenTestPageInNewTab(kMainHtmlPage);
   std::string constraints("{video:true, audio:true}");
-  RunGetDisplayMedia(tab, constraints);
+  RunGetDisplayMedia(tab, constraints, /*is_fake_ui=*/true);
 
   std::string result;
   EXPECT_TRUE(content::ExecuteScriptAndExtractString(
@@ -173,7 +176,7 @@ IN_PROC_BROWSER_TEST_P(WebRtcGetDisplayMediaBrowserTestWithFakeUI,
   const std::string& constraints =
       base::StringPrintf("{video: {width: {max: %d}, frameRate: {max: %d}}}",
                          kMaxWidth, kMaxFrameRate);
-  RunGetDisplayMedia(tab, constraints);
+  RunGetDisplayMedia(tab, constraints, /*is_fake_ui=*/true);
 
   std::string result;
   EXPECT_TRUE(content::ExecuteScriptAndExtractString(