[RLS] Don't create PaintLayerCompositor layers.

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1737 matching lines @@
   FixedLayoutTestWebViewClient client;
   client.m_screenInfo.deviceScaleFactor = 1;
   int viewportWidth = 640;
   int viewportHeight = 480;
 
   FrameTestHelpers::WebViewHelper webViewHelper;
 
   webViewHelper.initializeAndLoad(m_baseURL + "0-by-0.html", true, nullptr,
                                   &client, nullptr, configureAndroid);
   webViewHelper.webView()->settings()->setForceZeroLayoutHeight(true);
+  webViewHelper.webView()->updateAllLifecyclePhases();
+
   PaintLayerCompositor* compositor = webViewHelper.webView()->compositor();
+  GraphicsLayer* scrollContainer = compositor->containerLayer();
+  if (!scrollContainer)
+    scrollContainer = compositor->rootGraphicsLayer();
+
   EXPECT_EQ(0, webViewHelper.webView()
                    ->mainFrameImpl()
                    ->frameView()
                    ->layoutSize()
                    .width());
   EXPECT_EQ(0, webViewHelper.webView()
                    ->mainFrameImpl()
                    ->frameView()
                    ->layoutSize()
                    .height());
-  EXPECT_EQ(0.0, compositor->containerLayer()->size().width());
-  EXPECT_EQ(0.0, compositor->containerLayer()->size().height());
+  EXPECT_EQ(0.0, scrollContainer->size().width());
+  EXPECT_EQ(0.0, scrollContainer->size().height());
 
   webViewHelper.resize(WebSize(viewportWidth, 0));
   EXPECT_EQ(viewportWidth, webViewHelper.webView()
                                ->mainFrameImpl()
                                ->frameView()
                                ->layoutSize()
                                .width());
   EXPECT_EQ(0, webViewHelper.webView()
                    ->mainFrameImpl()
                    ->frameView()
                    ->layoutSize()
                    .height());
-  EXPECT_EQ(viewportWidth, compositor->containerLayer()->size().width());
-  EXPECT_EQ(0.0, compositor->containerLayer()->size().height());
+  EXPECT_EQ(viewportWidth, scrollContainer->size().width());
+  EXPECT_EQ(0.0, scrollContainer->size().height());
 
   // The flag ForceZeroLayoutHeight will cause the following resize of viewport
   // height to be ignored by the outer viewport (the container layer of
   // LayerCompositor). The height of the visualViewport, however, is not
   // affected.
   webViewHelper.resize(WebSize(viewportWidth, viewportHeight));
   EXPECT_FALSE(
       webViewHelper.webView()->mainFrameImpl()->frameView()->needsLayout());
   EXPECT_EQ(viewportWidth, webViewHelper.webView()
                                ->mainFrameImpl()
                                ->frameView()
                                ->layoutSize()
                                .width());
   EXPECT_EQ(0, webViewHelper.webView()
                    ->mainFrameImpl()
                    ->frameView()
                    ->layoutSize()
                    .height());
-  EXPECT_EQ(viewportWidth, compositor->containerLayer()->size().width());
-  EXPECT_EQ(viewportHeight, compositor->containerLayer()->size().height());
+  EXPECT_EQ(viewportWidth, scrollContainer->size().width());
+  EXPECT_EQ(viewportHeight, scrollContainer->size().height());
 
   LocalFrame* frame = webViewHelper.webView()->mainFrameImpl()->frame();
   VisualViewport& visualViewport = frame->page()->frameHost().visualViewport();
   EXPECT_EQ(viewportHeight, visualViewport.containerLayer()->size().height());
   EXPECT_TRUE(
       visualViewport.containerLayer()->platformLayer()->masksToBounds());
-  EXPECT_FALSE(compositor->containerLayer()->platformLayer()->masksToBounds());
+  EXPECT_FALSE(scrollContainer->platformLayer()->masksToBounds());
 }
 
 TEST_P(ParameterizedWebFrameTest, SetForceZeroLayoutHeight) {
   registerMockedHttpURLLoad("200-by-300.html");
 
   FixedLayoutTestWebViewClient client;
   client.m_screenInfo.deviceScaleFactor = 1;
   int viewportWidth = 640;
   int viewportHeight = 480;
 
@@ skipping 9540 matching lines @@
   FrameTestHelpers::WebViewHelper openerHelper;
   openerHelper.initialize(false, nullptr, &openerWebViewClient);
   FrameTestHelpers::WebViewHelper helper;
   helper.initializeWithOpener(openerHelper.webView()->mainFrame());
 
   openerHelper.reset();
   EXPECT_EQ(nullptr, helper.webView()->mainFrameImpl()->opener());
 }
 
 }  // namespace blink