Make render pipeline throttling opt-in

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

 // 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 "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "platform/testing/URLTestHelpers.h"
 #include "platform/testing/UnitTestHelpers.h"
@@ skipping 246 matching lines @@
     SimRequest mainResource("https://example.com/", "text/html");
     SimRequest frameResource("https://example.com/iframe.html", "text/html");
 
     loadURL("https://example.com/");
     mainResource.complete("<iframe id=frame sandbox src=iframe.html></iframe>");
     frameResource.complete("<style> html { background: green; } </style>");
 
     // Move the frame offscreen to throttle it.
     auto* frameElement = toHTMLIFrameElement(document().getElementById("frame"));
     frameElement->setAttribute(styleAttr, "transform: translateY(480px)");
-    EXPECT_FALSE(frameElement->contentDocument()->view()->shouldThrottleRendering());
+    EXPECT_FALSE(frameElement->contentDocument()->view()->canThrottleRendering());
     compositeFrame();
-    EXPECT_TRUE(frameElement->contentDocument()->view()->shouldThrottleRendering());
+    EXPECT_TRUE(frameElement->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()->frameView()->setScrollPosition(DoublePoint(0, 480), ProgrammaticScroll);
     auto displayItems = compositeFrame();
     EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "green"));
 
     // Now the frame contents should be visible again.
     auto displayItems2 = compositeFrame();
     EXPECT_TRUE(displayItems2.contains(SimCanvas::Rect, "green"));
 }
 
 TEST_F(FrameThrottlingTest, ChangeStyleInThrottledFrame)
 {
     // Create a hidden frame which is throttled.
     SimRequest mainResource("https://example.com/", "text/html");
     SimRequest frameResource("https://example.com/iframe.html", "text/html");
 
     loadURL("https://example.com/");
     mainResource.complete("<iframe id=frame sandbox src=iframe.html></iframe>");
     frameResource.complete("<style> html { background: red; } </style>");
 
     // Move the frame offscreen to throttle it.
     auto* frameElement = toHTMLIFrameElement(document().getElementById("frame"));
     frameElement->setAttribute(styleAttr, "transform: translateY(480px)");
-    EXPECT_FALSE(frameElement->contentDocument()->view()->shouldThrottleRendering());
+    EXPECT_FALSE(frameElement->contentDocument()->view()->canThrottleRendering());
     compositeFrame();
-    EXPECT_TRUE(frameElement->contentDocument()->view()->shouldThrottleRendering());
+    EXPECT_TRUE(frameElement->contentDocument()->view()->canThrottleRendering());
 
     // Change the background color of the frame's contents from red to green.
     frameElement->contentDocument()->body()->setAttribute(styleAttr, "background: green");
 
     // Scroll down to unthrottle the frame.
     webView().mainFrameImpl()->frameView()->setScrollPosition(DoublePoint(0, 480), ProgrammaticScroll);
     auto displayItems = compositeFrame();
     EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "red"));
     EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "green"));
 
@@ skipping 23 matching lines @@
     FrameTestHelpers::loadFrame(localFrame, baseURL.utf8() + "simple_div.html");
 
     FrameView* frameView = toWebLocalFrameImpl(localFrame)->frameView();
     EXPECT_TRUE(frameView->frame().isLocalRoot());
 
     // Enable throttling for the child frame.
     frameView->setFrameRect(IntRect(0, 480, frameView->width(), frameView->height()));
     frameView->frame().securityContext()->setSecurityOrigin(SecurityOrigin::createUnique());
     frameView->updateAllLifecyclePhases();
     testing::runPendingTasks();
-    EXPECT_TRUE(frameView->shouldThrottleRendering());
+    EXPECT_TRUE(frameView->canThrottleRendering());
 
     Document* frameDocument = frameView->frame().document();
     EXPECT_EQ(DocumentLifecycle::PaintClean, frameDocument->lifecycle().state());
 
     // Mutate the local child frame contents.
     auto* divElement = frameDocument->getElementById("div");
     divElement->setAttribute(styleAttr, "width: 50px");
     EXPECT_EQ(DocumentLifecycle::VisualUpdatePending, frameDocument->lifecycle().state());
 
     // Update the lifecycle again. The frame's lifecycle should not advance
     // because of throttling even though it is the local root.
+    DocumentLifecycle::AllowThrottlingScope throttlingScope(frameDocument->lifecycle());
     frameView->updateAllLifecyclePhases();
     testing::runPendingTasks();
     EXPECT_EQ(DocumentLifecycle::VisualUpdatePending, frameDocument->lifecycle().state());
     webView->close();
 }
 
 } // namespace blink