[scheduler] Fix --disable-background-timer-throttling flag.

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

Index: third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp b/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
deleted file mode 100644
index e2a4891eabfac070d5db544b416c2ec9a0176d9f..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
+++ /dev/null
@@ -1,1142 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "bindings/core/v8/ScriptController.h"
-#include "bindings/core/v8/ScriptSourceCode.h"
-#include "core/dom/Document.h"
-#include "core/dom/Element.h"
-#include "core/frame/FrameView.h"
-#include "core/frame/LocalFrame.h"
-#include "core/html/HTMLIFrameElement.h"
-#include "core/layout/api/LayoutViewItem.h"
-#include "core/layout/compositing/CompositedLayerMapping.h"
-#include "core/page/FocusController.h"
-#include "core/page/Page.h"
-#include "core/paint/PaintLayer.h"
-#include "platform/graphics/paint/TransformPaintPropertyNode.h"
-#include "platform/testing/RuntimeEnabledFeaturesTestHelpers.h"
-#include "platform/testing/URLTestHelpers.h"
-#include "platform/testing/UnitTestHelpers.h"
-#include "public/platform/WebDisplayItemList.h"
-#include "public/platform/WebLayer.h"
-#include "public/web/WebFrameContentDumper.h"
-#include "public/web/WebHitTestResult.h"
-#include "public/web/WebSettings.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "web/WebLocalFrameImpl.h"
-#include "web/WebRemoteFrameImpl.h"
-#include "web/tests/sim/SimCompositor.h"
-#include "web/tests/sim/SimDisplayItemList.h"
-#include "web/tests/sim/SimRequest.h"
-#include "web/tests/sim/SimTest.h"
-
-using testing::_;
-
-namespace blink {
-
-using namespace HTMLNames;
-
-// NOTE: This test uses <iframe sandbox> to create cross origin iframes.
-
-namespace {
-
-class MockWebDisplayItemList : public WebDisplayItemList {
- public:
-  ~MockWebDisplayItemList() override {}
-
-  MOCK_METHOD2(AppendDrawingItem,
-               void(const WebRect&, sk_sp<const PaintRecord>));
-};
-
-void PaintRecursively(GraphicsLayer* layer, WebDisplayItemList* display_items) {
-  if (layer->DrawsContent()) {
-    layer->SetNeedsDisplay();
-    layer->ContentLayerDelegateForTesting()->PaintContents(
-        display_items, ContentLayerDelegate::kPaintDefaultBehaviorForTest);
-  }
-  for (const auto& child : layer->Children())
-    PaintRecursively(child, display_items);
-}
-
-}  // namespace
-
-class FrameThrottlingTest : public SimTest,
-                            public ::testing::WithParamInterface<bool>,
-                            private ScopedRootLayerScrollingForTest {
- protected:
-  FrameThrottlingTest() : ScopedRootLayerScrollingForTest(GetParam()) {
-    WebView().Resize(WebSize(640, 480));
-  }
-
-  SimDisplayItemList CompositeFrame() {
-    SimDisplayItemList display_items = Compositor().BeginFrame();
-    // Ensure intersection observer notifications get delivered.
-    testing::RunPendingTasks();
-    return display_items;
-  }
-
-  // Number of rectangles that make up the root layer's touch handler region.
-  size_t TouchHandlerRegionSize() {
-    size_t result = 0;
-    PaintLayer* layer =
-        WebView().MainFrameImpl()->GetFrame()->ContentLayoutObject()->Layer();
-    GraphicsLayer* own_graphics_layer =
-        layer->GraphicsLayerBacking(&layer->GetLayoutObject());
-    if (own_graphics_layer) {
-      result +=
-          own_graphics_layer->PlatformLayer()->TouchEventHandlerRegion().size();
-    }
-    GraphicsLayer* child_graphics_layer = layer->GraphicsLayerBacking();
-    if (child_graphics_layer && child_graphics_layer != own_graphics_layer) {
-      result += child_graphics_layer->PlatformLayer()
-                    ->TouchEventHandlerRegion()
-                    .size();
-    }
-    return result;
-  }
-};
-
-INSTANTIATE_TEST_CASE_P(All, FrameThrottlingTest, ::testing::Bool());
-
-TEST_P(FrameThrottlingTest, ThrottleInvisibleFrames) {
-  SimRequest main_resource("https://example.com/", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe sandbox id=frame></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-
-  // Initially both frames are visible.
-  EXPECT_FALSE(GetDocument().View()->IsHiddenForThrottling());
-  EXPECT_FALSE(frame_document->View()->IsHiddenForThrottling());
-
-  // Moving the child fully outside the parent makes it invisible.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_FALSE(GetDocument().View()->IsHiddenForThrottling());
-  EXPECT_TRUE(frame_document->View()->IsHiddenForThrottling());
-
-  // A partially visible child is considered visible.
-  frame_element->setAttribute(styleAttr,
-                              "transform: translate(-50px, 0px, 0px)");
-  CompositeFrame();
-  EXPECT_FALSE(GetDocument().View()->IsHiddenForThrottling());
-  EXPECT_FALSE(frame_document->View()->IsHiddenForThrottling());
-}
-
-TEST_P(FrameThrottlingTest, HiddenSameOriginFramesAreNotThrottled) {
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame src=iframe.html></iframe>");
-  frame_resource.Complete("<iframe id=innerFrame></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-
-  HTMLIFrameElement* inner_frame_element =
-      toHTMLIFrameElement(frame_document->getElementById("innerFrame"));
-  auto* inner_frame_document = inner_frame_element->contentDocument();
-
-  EXPECT_FALSE(GetDocument().View()->CanThrottleRendering());
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_FALSE(inner_frame_document->View()->CanThrottleRendering());
-
-  // Hidden same origin frames are not throttled.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_FALSE(GetDocument().View()->CanThrottleRendering());
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_FALSE(inner_frame_document->View()->CanThrottleRendering());
-}
-
-TEST_P(FrameThrottlingTest, HiddenCrossOriginFramesAreThrottled) {
-  // Create a document with doubly nested iframes.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame src=iframe.html></iframe>");
-  frame_resource.Complete("<iframe id=innerFrame sandbox></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-
-  auto* inner_frame_element =
-      toHTMLIFrameElement(frame_document->getElementById("innerFrame"));
-  auto* inner_frame_document = inner_frame_element->contentDocument();
-
-  EXPECT_FALSE(GetDocument().View()->CanThrottleRendering());
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_FALSE(inner_frame_document->View()->CanThrottleRendering());
-
-  // Hidden cross origin frames are throttled.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_FALSE(GetDocument().View()->CanThrottleRendering());
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_TRUE(inner_frame_document->View()->CanThrottleRendering());
-}
-
-TEST_P(FrameThrottlingTest, HiddenCrossOriginZeroByZeroFramesAreNotThrottled) {
-  // Create a document with doubly nested iframes.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<iframe id=innerFrame width=0 height=0 sandbox></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-
-  auto* inner_frame_element =
-      toHTMLIFrameElement(frame_document->getElementById("innerFrame"));
-  auto* inner_frame_document = inner_frame_element->contentDocument();
-
-  EXPECT_FALSE(GetDocument().View()->CanThrottleRendering());
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_FALSE(inner_frame_document->View()->CanThrottleRendering());
-
-  // The frame is not throttled because its dimensions are 0x0.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_FALSE(GetDocument().View()->CanThrottleRendering());
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_FALSE(inner_frame_document->View()->CanThrottleRendering());
-}
-
-TEST_P(FrameThrottlingTest, ThrottledLifecycleUpdate) {
-  SimRequest main_resource("https://example.com/", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe sandbox id=frame></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-
-  // Enable throttling for the child frame.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_document->View()->CanThrottleRendering());
-  EXPECT_EQ(DocumentLifecycle::kPaintClean,
-            frame_document->Lifecycle().GetState());
-
-  // Mutating the throttled frame followed by a beginFrame will not result in
-  // a complete lifecycle update.
-  // TODO(skyostil): these expectations are either wrong, or the test is
-  // not exercising the code correctly. PaintClean means the entire lifecycle
-  // ran.
-  frame_element->setAttribute(widthAttr, "50");
-  CompositeFrame();
-  EXPECT_EQ(DocumentLifecycle::kPaintClean,
-            frame_document->Lifecycle().GetState());
-
-  // A hit test will not force a complete lifecycle update.
-  WebView().HitTestResultAt(WebPoint(0, 0));
-  EXPECT_EQ(DocumentLifecycle::kPaintClean,
-            frame_document->Lifecycle().GetState());
-}
-
-TEST_P(FrameThrottlingTest, UnthrottlingFrameSchedulesAnimation) {
-  SimRequest main_resource("https://example.com/", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe sandbox id=frame></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-
-  // First make the child hidden to enable throttling.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_FALSE(Compositor().NeedsBeginFrame());
-
-  // Then bring it back on-screen. This should schedule an animation update.
-  frame_element->setAttribute(styleAttr, "");
-  CompositeFrame();
-  EXPECT_TRUE(Compositor().NeedsBeginFrame());
-}
-
-TEST_P(FrameThrottlingTest, MutatingThrottledFrameDoesNotCauseAnimation) {
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("<style> html { background: red; } </style>");
-
-  // Check that the frame initially shows up.
-  auto display_items1 = CompositeFrame();
-  EXPECT_TRUE(display_items1.Contains(SimCanvas::kRect, "red"));
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-
-  // Move the frame offscreen to throttle it.
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Mutating the throttled frame should not cause an animation to be scheduled.
-  frame_element->contentDocument()->documentElement()->setAttribute(
-      styleAttr, "background: green");
-  EXPECT_FALSE(Compositor().NeedsBeginFrame());
-
-  // Move the frame back on screen to unthrottle it.
-  frame_element->setAttribute(styleAttr, "");
-  EXPECT_TRUE(Compositor().NeedsBeginFrame());
-
-  // The first frame we composite after unthrottling won't contain the
-  // frame's new contents because unthrottling happens at the end of the
-  // lifecycle update. We need to do another composite to refresh the frame's
-  // contents.
-  auto display_items2 = CompositeFrame();
-  EXPECT_FALSE(display_items2.Contains(SimCanvas::kRect, "green"));
-  EXPECT_TRUE(Compositor().NeedsBeginFrame());
-
-  auto display_items3 = CompositeFrame();
-  EXPECT_TRUE(display_items3.Contains(SimCanvas::kRect, "green"));
-}
-
-TEST_P(FrameThrottlingTest, SynchronousLayoutInThrottledFrame) {
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("<div id=div></div>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-
-  // Change the size of a div in the throttled frame.
-  auto* div_element = frame_element->contentDocument()->getElementById("div");
-  div_element->setAttribute(styleAttr, "width: 50px");
-
-  // Querying the width of the div should do a synchronous layout update even
-  // though the frame is being throttled.
-  EXPECT_EQ(50, div_element->clientWidth());
-}
-
-TEST_P(FrameThrottlingTest, UnthrottlingTriggersRepaint) {
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("<style> html { background: green; } </style>");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Scroll down to unthrottle the frame. The first frame we composite after
-  // scrolling won't contain the frame yet, but will schedule another repaint.
-  WebView()
-      .MainFrameImpl()
-      ->GetFrameView()
-      ->LayoutViewportScrollableArea()
-      ->SetScrollOffset(ScrollOffset(0, 480), kProgrammaticScroll);
-  auto display_items = CompositeFrame();
-  EXPECT_FALSE(display_items.Contains(SimCanvas::kRect, "green"));
-
-  // Now the frame contents should be visible again.
-  auto display_items2 = CompositeFrame();
-  EXPECT_TRUE(display_items2.Contains(SimCanvas::kRect, "green"));
-}
-
-TEST_P(FrameThrottlingTest, UnthrottlingTriggersRepaintInCompositedChild) {
-  // Create a hidden frame with a composited child layer.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<style>"
-      "div { "
-      "  width: 100px;"
-      "  height: 100px;"
-      "  background-color: green;"
-      "  transform: translateZ(0);"
-      "}"
-      "</style><div></div>");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Scroll down to unthrottle the frame. The first frame we composite after
-  // scrolling won't contain the frame yet, but will schedule another repaint.
-  WebView()
-      .MainFrameImpl()
-      ->GetFrameView()
-      ->LayoutViewportScrollableArea()
-      ->SetScrollOffset(ScrollOffset(0, 480), kProgrammaticScroll);
-  auto display_items = CompositeFrame();
-  EXPECT_FALSE(display_items.Contains(SimCanvas::kRect, "green"));
-
-  // Now the composited child contents should be visible again.
-  auto display_items2 = CompositeFrame();
-  EXPECT_TRUE(display_items2.Contains(SimCanvas::kRect, "green"));
-}
-
-TEST_P(FrameThrottlingTest, ChangeStyleInThrottledFrame) {
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("<style> html { background: red; } </style>");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Change the background color of the frame's contents from red to green.
-  frame_element->contentDocument()->body()->setAttribute(styleAttr,
-                                                         "background: green");
-
-  // Scroll down to unthrottle the frame.
-  WebView()
-      .MainFrameImpl()
-      ->GetFrameView()
-      ->LayoutViewportScrollableArea()
-      ->SetScrollOffset(ScrollOffset(0, 480), kProgrammaticScroll);
-  auto display_items = CompositeFrame();
-  EXPECT_FALSE(display_items.Contains(SimCanvas::kRect, "red"));
-  EXPECT_FALSE(display_items.Contains(SimCanvas::kRect, "green"));
-
-  // Make sure the new style shows up instead of the old one.
-  auto display_items2 = CompositeFrame();
-  EXPECT_TRUE(display_items2.Contains(SimCanvas::kRect, "green"));
-}
-
-TEST_P(FrameThrottlingTest, ChangeOriginInThrottledFrame) {
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("http://example.com/", "text/html");
-  SimRequest frame_resource("http://sub.example.com/iframe.html", "text/html");
-  LoadURL("http://example.com/");
-  main_resource.Complete(
-      "<iframe style='position: absolute; top: 10000px' id=frame "
-      "src=http://sub.example.com/iframe.html></iframe>");
-  frame_resource.Complete("");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-
-  CompositeFrame();
-
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      frame_element->contentDocument()->GetFrame()->IsCrossOriginSubframe());
-  EXPECT_FALSE(frame_element->contentDocument()
-                   ->View()
-                   ->GetLayoutView()
-                   ->NeedsPaintPropertyUpdate());
-
-  NonThrowableExceptionState exception_state;
-
-  // Security policy requires setting domain on both frames.
-  GetDocument().setDomain(String("example.com"), exception_state);
-  frame_element->contentDocument()->setDomain(String("example.com"),
-                                              exception_state);
-
-  EXPECT_FALSE(
-      frame_element->contentDocument()->GetFrame()->IsCrossOriginSubframe());
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(frame_element->contentDocument()
-                  ->View()
-                  ->GetLayoutView()
-                  ->NeedsPaintPropertyUpdate());
-}
-
-TEST_P(FrameThrottlingTest, ThrottledFrameWithFocus) {
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  RuntimeEnabledFeatures::setCompositedSelectionUpdateEnabled(true);
-
-  // Create a hidden frame which is throttled and has a text selection.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<iframe id=frame sandbox=allow-scripts src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "some text to select\n"
-      "<script>\n"
-      "var range = document.createRange();\n"
-      "range.selectNode(document.body);\n"
-      "window.getSelection().addRange(range);\n"
-      "</script>\n");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Give the frame focus and do another composite. The selection in the
-  // compositor should be cleared because the frame is throttled.
-  EXPECT_FALSE(Compositor().HasSelection());
-  GetDocument().GetPage()->GetFocusController().SetFocusedFrame(
-      frame_element->contentDocument()->GetFrame());
-  GetDocument().body()->setAttribute(styleAttr, "background: green");
-  CompositeFrame();
-  EXPECT_FALSE(Compositor().HasSelection());
-}
-
-TEST_P(FrameThrottlingTest, ScrollingCoordinatorShouldSkipThrottledFrame) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<style> html { background-image: linear-gradient(red, blue); "
-      "background-attachment: fixed; } </style>");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Change style of the frame's content to make it in VisualUpdatePending
-  // state.
-  frame_element->contentDocument()->body()->setAttribute(styleAttr,
-                                                         "background: green");
-  // Change root frame's layout so that the next lifecycle update will call
-  // ScrollingCoordinator::updateAfterCompositingChangeIfNeeded().
-  GetDocument().body()->setAttribute(styleAttr, "margin: 20px");
-  EXPECT_EQ(DocumentLifecycle::kVisualUpdatePending,
-            frame_element->contentDocument()->Lifecycle().GetState());
-
-  DocumentLifecycle::AllowThrottlingScope throttling_scope(
-      GetDocument().Lifecycle());
-  // This will call ScrollingCoordinator::updateAfterCompositingChangeIfNeeded()
-  // and should not cause assert failure about
-  // isAllowedToQueryCompositingState() in the throttled frame.
-  GetDocument().View()->UpdateAllLifecyclePhases();
-  testing::RunPendingTasks();
-  EXPECT_EQ(DocumentLifecycle::kVisualUpdatePending,
-            frame_element->contentDocument()->Lifecycle().GetState());
-  // The fixed background in the throttled sub frame should not cause main
-  // thread scrolling.
-  EXPECT_FALSE(GetDocument()
-                   .View()
-                   ->LayoutViewportScrollableArea()
-                   ->ShouldScrollOnMainThread());
-
-  // Make the frame visible by changing its transform. This doesn't cause a
-  // layout, but should still unthrottle the frame.
-  frame_element->setAttribute(styleAttr, "transform: translateY(0px)");
-  CompositeFrame();
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  // The fixed background in the throttled sub frame should be considered.
-  EXPECT_TRUE(frame_element->contentDocument()
-                  ->View()
-                  ->LayoutViewportScrollableArea()
-                  ->ShouldScrollOnMainThread());
-  EXPECT_FALSE(GetDocument()
-                   .View()
-                   ->LayoutViewportScrollableArea()
-                   ->ShouldScrollOnMainThread());
-}
-
-TEST_P(FrameThrottlingTest, ScrollingCoordinatorShouldSkipThrottledLayer) {
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  WebView().GetSettings()->SetPreferCompositingToLCDTextEnabled(true);
-
-  // Create a hidden frame which is throttled and has a touch handler inside a
-  // composited layer.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<iframe id=frame sandbox=allow-scripts src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<div id=div style='transform: translateZ(0)' ontouchstart='foo()'>touch "
-      "handler</div>");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Change style of the frame's content to make it in VisualUpdatePending
-  // state.
-  frame_element->contentDocument()->body()->setAttribute(styleAttr,
-                                                         "background: green");
-  // Change root frame's layout so that the next lifecycle update will call
-  // ScrollingCoordinator::updateAfterCompositingChangeIfNeeded().
-  GetDocument().body()->setAttribute(styleAttr, "margin: 20px");
-  EXPECT_EQ(DocumentLifecycle::kVisualUpdatePending,
-            frame_element->contentDocument()->Lifecycle().GetState());
-
-  DocumentLifecycle::AllowThrottlingScope throttling_scope(
-      GetDocument().Lifecycle());
-  // This will call ScrollingCoordinator::updateAfterCompositingChangeIfNeeded()
-  // and should not cause assert failure about
-  // isAllowedToQueryCompositingState() in the throttled frame.
-  GetDocument().View()->UpdateAllLifecyclePhases();
-  testing::RunPendingTasks();
-  EXPECT_EQ(DocumentLifecycle::kVisualUpdatePending,
-            frame_element->contentDocument()->Lifecycle().GetState());
-}
-
-TEST_P(FrameThrottlingTest,
-       ScrollingCoordinatorShouldSkipCompositedThrottledFrame) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  WebView().GetSettings()->SetPreferCompositingToLCDTextEnabled(true);
-
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("<div style='height: 2000px'></div>");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Change style of the frame's content to make it in VisualUpdatePending
-  // state.
-  frame_element->contentDocument()->body()->setAttribute(styleAttr,
-                                                         "background: green");
-  // Change root frame's layout so that the next lifecycle update will call
-  // ScrollingCoordinator::updateAfterCompositingChangeIfNeeded().
-  GetDocument().body()->setAttribute(styleAttr, "margin: 20px");
-  EXPECT_EQ(DocumentLifecycle::kVisualUpdatePending,
-            frame_element->contentDocument()->Lifecycle().GetState());
-
-  DocumentLifecycle::AllowThrottlingScope throttling_scope(
-      GetDocument().Lifecycle());
-  // This will call ScrollingCoordinator::updateAfterCompositingChangeIfNeeded()
-  // and should not cause assert failure about
-  // isAllowedToQueryCompositingState() in the throttled frame.
-  CompositeFrame();
-  EXPECT_EQ(DocumentLifecycle::kVisualUpdatePending,
-            frame_element->contentDocument()->Lifecycle().GetState());
-
-  // Make the frame visible by changing its transform. This doesn't cause a
-  // layout, but should still unthrottle the frame.
-  frame_element->setAttribute(styleAttr, "transform: translateY(0px)");
-  CompositeFrame();  // Unthrottle the frame.
-  CompositeFrame();  // Handle the pending visual update of the unthrottled
-                     // frame.
-  EXPECT_EQ(DocumentLifecycle::kPaintClean,
-            frame_element->contentDocument()->Lifecycle().GetState());
-  EXPECT_TRUE(
-      frame_element->contentDocument()->View()->UsesCompositedScrolling());
-}
-
-TEST_P(FrameThrottlingTest, UnthrottleByTransformingWithoutLayout) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("");
-
-  // Move the frame offscreen to throttle it.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Make the frame visible by changing its transform. This doesn't cause a
-  // layout, but should still unthrottle the frame.
-  frame_element->setAttribute(styleAttr, "transform: translateY(0px)");
-  CompositeFrame();
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-}
-
-TEST_P(FrameThrottlingTest, ThrottledTopLevelEventHandlerIgnored) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-  EXPECT_EQ(0u, TouchHandlerRegionSize());
-
-  // Create a frame which is throttled and has two different types of
-  // top-level touchstart handlers.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<iframe id=frame sandbox=allow-scripts src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<script>"
-      "window.addEventListener('touchstart', function(){}, {passive: false});"
-      "document.addEventListener('touchstart', function(){}, {passive: false});"
-      "</script>");
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();  // Throttle the frame.
-  CompositeFrame();  // Update touch handler regions.
-
-  // The touch handlers in the throttled frame should have been ignored.
-  EXPECT_EQ(0u, TouchHandlerRegionSize());
-
-  // Unthrottling the frame makes the touch handlers active again. Note that
-  // both handlers get combined into the same rectangle in the region, so
-  // there is only one rectangle in total.
-  frame_element->setAttribute(styleAttr, "transform: translateY(0px)");
-  CompositeFrame();  // Unthrottle the frame.
-  CompositeFrame();  // Update touch handler regions.
-  EXPECT_EQ(1u, TouchHandlerRegionSize());
-}
-
-TEST_P(FrameThrottlingTest, ThrottledEventHandlerIgnored) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-  EXPECT_EQ(0u, TouchHandlerRegionSize());
-
-  // Create a frame which is throttled and has a non-top-level touchstart
-  // handler.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<iframe id=frame sandbox=allow-scripts src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<div id=d>touch handler</div>"
-      "<script>"
-      "document.querySelector('#d').addEventListener('touchstart', "
-      "function(){});"
-      "</script>");
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();  // Throttle the frame.
-  CompositeFrame();  // Update touch handler regions.
-
-  // The touch handler in the throttled frame should have been ignored.
-  EXPECT_EQ(0u, TouchHandlerRegionSize());
-
-  // Unthrottling the frame makes the touch handler active again.
-  frame_element->setAttribute(styleAttr, "transform: translateY(0px)");
-  CompositeFrame();  // Unthrottle the frame.
-  CompositeFrame();  // Update touch handler regions.
-  EXPECT_EQ(1u, TouchHandlerRegionSize());
-}
-
-TEST_P(FrameThrottlingTest, DumpThrottledFrame) {
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-
-  // Create a frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "main <iframe id=frame sandbox=allow-scripts src=iframe.html></iframe>");
-  frame_resource.Complete("");
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  LocalFrame* local_frame = ToLocalFrame(frame_element->ContentFrame());
-  local_frame->GetScriptController().ExecuteScriptInMainWorld(
-      "document.body.innerHTML = 'throttled'");
-  EXPECT_FALSE(Compositor().NeedsBeginFrame());
-
-  // The dumped contents should not include the throttled frame.
-  DocumentLifecycle::AllowThrottlingScope throttling_scope(
-      GetDocument().Lifecycle());
-  WebString result = WebFrameContentDumper::DeprecatedDumpFrameTreeAsText(
-      WebView().MainFrameImpl(), 1024);
-  EXPECT_NE(std::string::npos, result.Utf8().find("main"));
-  EXPECT_EQ(std::string::npos, result.Utf8().find("throttled"));
-}
-
-TEST_P(FrameThrottlingTest, PaintingViaContentLayerDelegateIsThrottled) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  WebView().GetSettings()->SetPreferCompositingToLCDTextEnabled(true);
-
-  // Create a hidden frame which is throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("throttled");
-  CompositeFrame();
-
-  // Move the frame offscreen to throttle it and make sure it is backed by a
-  // graphics layer.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr,
-                              "transform: translateY(480px) translateZ(0px)");
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // If painting of the iframe is throttled, we should only receive two
-  // drawing items.
-  MockWebDisplayItemList display_items;
-  EXPECT_CALL(display_items, AppendDrawingItem(_, _)).Times(2);
-
-  GraphicsLayer* layer = WebView().RootGraphicsLayer();
-  PaintRecursively(layer, &display_items);
-}
-
-TEST_P(FrameThrottlingTest, ThrottleSubtreeAtomically) {
-  // Create two nested frames which are throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-  SimRequest child_frame_resource("https://example.com/child-iframe.html",
-                                  "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<iframe id=child-frame sandbox src=child-iframe.html></iframe>");
-  child_frame_resource.Complete("");
-
-  // Move both frames offscreen, but don't run the intersection observers yet.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* child_frame_element = toHTMLIFrameElement(
-      frame_element->contentDocument()->getElementById("child-frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  Compositor().BeginFrame();
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_FALSE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Only run the intersection observer for the parent frame. Both frames
-  // should immediately become throttled. This simulates the case where a task
-  // such as BeginMainFrame runs in the middle of dispatching intersection
-  // observer notifications.
-  frame_element->contentDocument()
-      ->View()
-      ->UpdateRenderThrottlingStatusForTesting();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Both frames should still be throttled after the second notification.
-  child_frame_element->contentDocument()
-      ->View()
-      ->UpdateRenderThrottlingStatusForTesting();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Move the frame back on screen but don't update throttling yet.
-  frame_element->setAttribute(styleAttr, "transform: translateY(0px)");
-  Compositor().BeginFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Update throttling for the child. It should remain throttled because the
-  // parent is still throttled.
-  child_frame_element->contentDocument()
-      ->View()
-      ->UpdateRenderThrottlingStatusForTesting();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Updating throttling on the parent should unthrottle both frames.
-  frame_element->contentDocument()
-      ->View()
-      ->UpdateRenderThrottlingStatusForTesting();
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_FALSE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-}
-
-TEST_P(FrameThrottlingTest, SkipPaintingLayersInThrottledFrames) {
-  WebView().GetSettings()->SetAcceleratedCompositingEnabled(true);
-  WebView().GetSettings()->SetPreferCompositingToLCDTextEnabled(true);
-
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<div id=div style='transform: translateZ(0); background: "
-      "red'>layer</div>");
-  auto display_items = CompositeFrame();
-  EXPECT_TRUE(display_items.Contains(SimCanvas::kRect, "red"));
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  auto* frame_document = frame_element->contentDocument();
-  EXPECT_EQ(DocumentLifecycle::kPaintClean,
-            frame_document->Lifecycle().GetState());
-
-  // Simulate the paint for a graphics layer being externally invalidated
-  // (e.g., by video playback).
-  frame_document->View()
-      ->GetLayoutViewItem()
-      .InvalidatePaintForViewAndCompositedLayers();
-
-  // The layer inside the throttled frame should not get painted.
-  auto display_items2 = CompositeFrame();
-  EXPECT_FALSE(display_items2.Contains(SimCanvas::kRect, "red"));
-}
-
-TEST_P(FrameThrottlingTest, SynchronousLayoutInAnimationFrameCallback) {
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-
-  // Prepare a page with two cross origin frames (from the same origin so they
-  // are able to access eachother).
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest first_frame_resource("https://thirdparty.com/first.html",
-                                  "text/html");
-  SimRequest second_frame_resource("https://thirdparty.com/second.html",
-                                   "text/html");
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<iframe id=first name=first "
-      "src='https://thirdparty.com/first.html'></iframe>\n"
-      "<iframe id=second name=second "
-      "src='https://thirdparty.com/second.html'></iframe>");
-
-  // The first frame contains just a simple div. This frame will be made
-  // throttled.
-  first_frame_resource.Complete("<div id=d>first frame</div>");
-
-  // The second frame just used to execute a requestAnimationFrame callback.
-  second_frame_resource.Complete("");
-
-  // Throttle the first frame.
-  auto* first_frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("first"));
-  first_frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(
-      first_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Run a animation frame callback in the second frame which mutates the
-  // contents of the first frame and causes a synchronous style update. This
-  // should not result in an unexpected lifecycle state even if the first
-  // frame is throttled during the animation frame callback.
-  auto* second_frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("second"));
-  LocalFrame* local_frame = ToLocalFrame(second_frame_element->ContentFrame());
-  local_frame->GetScriptController().ExecuteScriptInMainWorld(
-      "window.requestAnimationFrame(function() {\n"
-      "  var throttledFrame = window.parent.frames.first;\n"
-      "  throttledFrame.document.documentElement.style = 'margin: 50px';\n"
-      "  throttledFrame.document.querySelector('#d').getBoundingClientRect();\n"
-      "});\n");
-  CompositeFrame();
-}
-
-TEST_P(FrameThrottlingTest, AllowOneAnimationFrame) {
-  WebView().GetSettings()->SetJavaScriptEnabled(true);
-
-  // Prepare a page with two cross origin frames (from the same origin so they
-  // are able to access eachother).
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://thirdparty.com/frame.html", "text/html");
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<iframe id=frame style=\"position: fixed; top: -10000px\" "
-      "src='https://thirdparty.com/frame.html'></iframe>");
-
-  frame_resource.Complete(
-      "<script>"
-      "window.requestAnimationFrame(() => { window.didRaf = true; });"
-      "</script>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  LocalFrame* local_frame = ToLocalFrame(frame_element->ContentFrame());
-  v8::HandleScope scope(v8::Isolate::GetCurrent());
-  v8::Local<v8::Value> result =
-      local_frame->GetScriptController().ExecuteScriptInMainWorldAndReturnValue(
-          ScriptSourceCode("window.didRaf;"));
-  EXPECT_TRUE(result->IsTrue());
-}
-
-TEST_P(FrameThrottlingTest, UpdatePaintPropertiesOnUnthrottling) {
-  if (!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
-    return;
-
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete("<div id='div'>Inner</div>");
-  CompositeFrame();
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-  auto* inner_div = frame_document->getElementById("div");
-  auto* inner_div_object = inner_div->GetLayoutObject();
-  EXPECT_FALSE(frame_document->View()->ShouldThrottleRendering());
-
-  frame_element->setAttribute(HTMLNames::styleAttr,
-                              "transform: translateY(1000px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_document->View()->CanThrottleRendering());
-  EXPECT_FALSE(inner_div_object->PaintProperties());
-
-  // Mutating the throttled frame should not cause paint property update.
-  inner_div->setAttribute(HTMLNames::styleAttr, "transform: translateY(20px)");
-  EXPECT_FALSE(Compositor().NeedsBeginFrame());
-  EXPECT_TRUE(frame_document->View()->CanThrottleRendering());
-  {
-    DocumentLifecycle::AllowThrottlingScope throttling_scope(
-        GetDocument().Lifecycle());
-    GetDocument().View()->UpdateAllLifecyclePhases();
-  }
-  EXPECT_FALSE(inner_div_object->PaintProperties());
-
-  // Move the frame back on screen to unthrottle it.
-  frame_element->setAttribute(HTMLNames::styleAttr, "");
-  // The first update unthrottles the frame, the second actually update layout
-  // and paint properties etc.
-  CompositeFrame();
-  CompositeFrame();
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-  EXPECT_EQ(
-      TransformationMatrix().Translate(0, 20),
-      inner_div->GetLayoutObject()->PaintProperties()->Transform()->Matrix());
-}
-
-TEST_P(FrameThrottlingTest, DisplayNoneNotThrottled) {
-  SimRequest main_resource("https://example.com/", "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete(
-      "<style>iframe { transform: translateY(480px); }</style>"
-      "<iframe sandbox id=frame></iframe>");
-
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* frame_document = frame_element->contentDocument();
-
-  // Initially the frame is throttled as it is offscreen.
-  CompositeFrame();
-  EXPECT_TRUE(frame_document->View()->CanThrottleRendering());
-
-  // Setting display:none unthrottles the frame.
-  frame_element->setAttribute(styleAttr, "display: none");
-  CompositeFrame();
-  EXPECT_FALSE(frame_document->View()->CanThrottleRendering());
-}
-
-TEST_P(FrameThrottlingTest, DisplayNoneChildrenRemainThrottled) {
-  // Create two nested frames which are throttled.
-  SimRequest main_resource("https://example.com/", "text/html");
-  SimRequest frame_resource("https://example.com/iframe.html", "text/html");
-  SimRequest child_frame_resource("https://example.com/child-iframe.html",
-                                  "text/html");
-
-  LoadURL("https://example.com/");
-  main_resource.Complete("<iframe id=frame sandbox src=iframe.html></iframe>");
-  frame_resource.Complete(
-      "<iframe id=child-frame sandbox src=child-iframe.html></iframe>");
-  child_frame_resource.Complete("");
-
-  // Move both frames offscreen to make them throttled.
-  auto* frame_element =
-      toHTMLIFrameElement(GetDocument().getElementById("frame"));
-  auto* child_frame_element = toHTMLIFrameElement(
-      frame_element->contentDocument()->getElementById("child-frame"));
-  frame_element->setAttribute(styleAttr, "transform: translateY(480px)");
-  CompositeFrame();
-  EXPECT_TRUE(frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-
-  // Setting display:none for the parent frame unthrottles the parent but not
-  // the child. This behavior matches Safari.
-  frame_element->setAttribute(styleAttr, "display: none");
-  CompositeFrame();
-  EXPECT_FALSE(
-      frame_element->contentDocument()->View()->CanThrottleRendering());
-  EXPECT_TRUE(
-      child_frame_element->contentDocument()->View()->CanThrottleRendering());
-}
-
-}  // namespace blink