Implements PrintBrowser mode.

third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp

 // Copyright 2016 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/paint/ObjectPaintInvalidator.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/api/LayoutPartItem.h"
@@ skipping 263 matching lines @@
   return value;
 }
 
 static void invalidatePaintRectangleOnWindow(
     const LayoutBoxModelObject& paintInvalidationContainer,
     const IntRect& dirtyRect) {
   FrameView* frameView = paintInvalidationContainer.frameView();
   DCHECK(paintInvalidationContainer.isLayoutView() &&
          paintInvalidationContainer.layer()->compositingState() ==
              NotComposited);
-  if (!frameView || paintInvalidationContainer.document().printing())
+
+  if (!frameView)
+    return;
+
+  if (paintInvalidationContainer.document().printing() &&
+      !RuntimeEnabledFeatures::printBrowserEnabled())
     return;
 
   DCHECK(frameView->frame().ownerLayoutItem().isNull());
 
   IntRect paintRect = dirtyRect;
   paintRect.intersect(frameView->visibleContentRect());
   if (paintRect.isEmpty())
     return;
 
   if (HostWindow* window = frameView->getHostWindow())
@@ skipping 89 matching lines @@
 }
 
 LayoutRect ObjectPaintInvalidator::invalidatePaintRectangle(
     const LayoutRect& dirtyRect,
     DisplayItemClient* displayItemClient) {
   CHECK(m_object.isRooted());
 
   if (dirtyRect.isEmpty())
     return LayoutRect();
 
-  if (m_object.view()->document().printing())
+  if (m_object.view()->document().printing() &&
+      !RuntimeEnabledFeatures::printBrowserEnabled())
     return LayoutRect();  // Don't invalidate paints if we're printing.
 
   const LayoutBoxModelObject& paintInvalidationContainer =
       m_object.containerForPaintInvalidation();
   LayoutRect dirtyRectOnBacking = dirtyRect;
   PaintLayer::mapRectToPaintInvalidationBacking(
       m_object, paintInvalidationContainer, dirtyRectOnBacking);
   dirtyRectOnBacking.move(m_object.scrollAdjustmentForPaintInvalidation(
       paintInvalidationContainer));
   invalidatePaintUsingContainer(paintInvalidationContainer, dirtyRectOnBacking,
@@ skipping 200 matching lines @@
 
   m_context.paintingLayer->setNeedsRepaint();
   m_object.invalidateDisplayItemClients(reason);
   return reason;
 }
 
 DisablePaintInvalidationStateAsserts::DisablePaintInvalidationStateAsserts()
     : m_disabler(&gDisablePaintInvalidationStateAsserts, true) {}
 
 }  // namespace blink