Make PageScaleFactor work for oopif subframes.

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 195 matching lines @@
   void zoomLimitsChanged(double minimumZoomLevel,
                          double maximumZoomLevel) override;
   float textZoomFactor() override;
   float setTextZoomFactor(float) override;
   bool zoomToMultipleTargetsRect(const WebRect&) override;
   float pageScaleFactor() const override;
   void setDefaultPageScaleLimits(float minScale, float maxScale) override;
   void setInitialPageScaleOverride(float) override;
   void setMaximumLegibleScale(float) override;
   void setPageScaleFactor(float) override;
+  float clampPageScaleFactorToLimits(float) const override;
   void setVisualViewportOffset(const WebFloatPoint&) override;
   WebFloatPoint visualViewportOffset() const override;
   WebFloatSize visualViewportSize() const override;
   void resetScrollAndScaleState() override;
   void setIgnoreViewportTagScaleLimits(bool) override;
   WebSize contentsPreferredMinimumSize() override;
   void setDisplayMode(WebDisplayMode) override;
 
   void setDeviceScaleFactor(float) override;
   void setZoomFactorForDeviceScaleFactor(float) override;
@@ skipping 46 matching lines @@
   float expensiveBackgroundThrottlingInitialBudget() override;
   float expensiveBackgroundThrottlingMaxBudget() override;
   float expensiveBackgroundThrottlingMaxDelay() override;
 
   void didUpdateFullscreenSize();
 
   float defaultMinimumPageScaleFactor() const;
   float defaultMaximumPageScaleFactor() const;
   float minimumPageScaleFactor() const;
   float maximumPageScaleFactor() const;
-  float clampPageScaleFactorToLimits(float) const;
   void resetScaleStateImmediately();
 
   HitTestResult coreHitTestResultAt(const WebPoint&);
   void invalidateRect(const IntRect&);
 
   void setBaseBackgroundColor(WebColor);
   void setBackgroundColorOverride(WebColor);
   void setZoomFactorOverride(float);
   void setCompositorDeviceScaleFactorOverride(float);
   void setDeviceEmulationTransform(const TransformationMatrix&);
@@ skipping 446 matching lines @@
   Persistent<ResizeViewportAnchor> m_resizeViewportAnchor;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 }  // namespace blink
 
 #endif