Test both viewports' scrollability during fullscreen-video

Background:
To disable scrolling (and pinch-zoom) during <video>-
fullscreen ScrollingCoordinator makes both viewports
unscrollable in updateAfterCompositingChangeIfNeeded().

Problem:
Currently only the outer viewport's scrollability-
setting is tested during fullscreen-video.

Solution:
Extend test case to also verify the inner viewport.

BUG=448738

Review URL: https://codereview.chromium.org/1287253005

git-svn-id: svn://svn.chromium.org/blink/trunk@201007 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

@@ -6513,19 +6513,24 @@ TEST_F(WebFrameTest, FullscreenLayerNonScrollable)
     webViewImpl->didEnterFullScreen();
     webViewImpl->layout();
 
-    // Verify that the main frame is nonscrollable.
+    // Verify that the viewports are nonscrollable.
     ASSERT_TRUE(Fullscreen::isFullScreen(*document));
-    WebLayer* webScrollLayer = webViewImpl->compositor()->scrollLayer()->platformLayer();
-    ASSERT_FALSE(webScrollLayer->userScrollableHorizontal());
-    ASSERT_FALSE(webScrollLayer->userScrollableVertical());
-
-    // Verify that the main frame is scrollable upon exiting fullscreen.
+    FrameView* frameView = webViewHelper.webViewImpl()->mainFrameImpl()->frameView();
+    WebLayer* layoutViewportScrollLayer = webViewImpl->compositor()->scrollLayer()->platformLayer();
+    WebLayer* visualViewportScrollLayer = frameView->page()->frameHost().visualViewport().scrollLayer()->platformLayer();
+    ASSERT_FALSE(layoutViewportScrollLayer->userScrollableHorizontal());
+    ASSERT_FALSE(layoutViewportScrollLayer->userScrollableVertical());
+    ASSERT_FALSE(visualViewportScrollLayer->userScrollableHorizontal());
+    ASSERT_FALSE(visualViewportScrollLayer->userScrollableVertical());
+
+    // Verify that the viewports are scrollable upon exiting fullscreen.
     webViewImpl->didExitFullScreen();
     webViewImpl->layout();
     ASSERT_FALSE(Fullscreen::isFullScreen(*document));
-    webScrollLayer = webViewImpl->compositor()->scrollLayer()->platformLayer();
-    ASSERT_TRUE(webScrollLayer->userScrollableHorizontal());
-    ASSERT_TRUE(webScrollLayer->userScrollableVertical());
+    ASSERT_TRUE(layoutViewportScrollLayer->userScrollableHorizontal());
+    ASSERT_TRUE(layoutViewportScrollLayer->userScrollableVertical());
+    ASSERT_TRUE(visualViewportScrollLayer->userScrollableHorizontal());
+    ASSERT_TRUE(visualViewportScrollLayer->userScrollableVertical());
 }
 
 TEST_P(ParameterizedWebFrameTest, FullscreenMainFrame)