Add Settings::useDefaultImageInterpolationQuality and use it in repaint tests

third_party/WebKit/Source/core/layout/ImageQualityController.cpp

 /*
  * Copyright (C) 2013 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 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/layout/ImageQualityController.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/Settings.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/Page.h"
 
 namespace blink {
 
 const double ImageQualityController::cLowQualityTimeThreshold = 0.500; // 500 ms
 const double ImageQualityController::cTimerRestartThreshold = 0.250; // 250 ms
 
 static ImageQualityController* gImageQualityController = nullptr;
 
@@ skipping 114 matching lines @@
     // quality.
     if (!image || !image->isBitmapImage())
         return false;
 
     if (!layer)
         return false;
 
     if (object.style()->imageRendering() == ImageRenderingOptimizeContrast)
         return true;
 
+    if (LocalFrame* frame = object.frame()) {
+        if (frame->settings() && frame->settings()->useDefaultImageInterpolationQuality())
+            return false;
+    }
+
     // Look ourselves up in the hashtables.
     ObjectLayerSizeMap::iterator i = m_objectLayerSizeMap.find(&object);
     LayerSizeMap* innerMap = nullptr;
     bool objectIsResizing = false;
     if (i != m_objectLayerSizeMap.end()) {
         innerMap = &i->value.layerSizeMap;
         objectIsResizing = i->value.isResizing;
     }
     LayoutSize oldSize;
     bool isFirstResize = true;
@@ skipping 35 matching lines @@
     }
     // This object has been resized to two different sizes while the timer
     // is active, so draw at low quality, set the flag for animated resizes and
     // the object to the list for high quality redraw.
     set(object, innerMap, layer, layoutSize, true);
     restartTimer(lastFrameTimeMonotonic);
     return true;
 }
 
 } // namespace blink