Implements PrintBrowser mode.

third_party/WebKit/Source/core/paint/PaintInvalidator.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/PaintInvalidator.h"
 
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ skipping 373 matching lines @@
   DCHECK(context.treeBuilderContext.current.paintOffset ==
          object.paintOffset());
 
   if (!context.forcedSubtreeInvalidationFlags &&
       !object
            .shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState())
     return;
 
   updatePaintingLayer(object, context);
 
-  if (object.document().printing())
+  if (object.document().printing() &&
+      !RuntimeEnabledFeatures::printBrowserEnabled())
     return;  // Don't invalidate paints if we're printing.
 
   TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"),
                "PaintInvalidator::invalidatePaintIfNeeded()", "object",
                object.debugName().ascii());
 
   updateContext(object, context);
 
   if (!object
            .shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState() &&
@@ skipping 40 matching lines @@
         PaintInvalidatorContext::ForcedSubtreeInvalidationRectUpdate;
 }
 
 void PaintInvalidator::processPendingDelayedPaintInvalidations() {
   for (auto target : m_pendingDelayedPaintInvalidations)
     target->getMutableForPainting().setShouldDoFullPaintInvalidation(
         PaintInvalidationDelayedFull);
 }
 
 }  // namespace blink