Pass min/max page scale to compositor from WebFrameWidget.

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

Index: third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
index 804f75d88c2f34fe3eaec5c1db5239ab51cbd93e..5011c431b72be6420dadbd259e2d568942383938 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -261,8 +261,10 @@ void WebFrameWidgetImpl::updateLayerTreeViewport() {
   if (!page() || !m_layerTreeView)
     return;
 
-  // FIXME: We need access to page scale information from the WebView.
-  m_layerTreeView->setPageScaleFactorAndLimits(1, 1, 1);
+  // Pass the limits even though this is for subframes, as the limits will be
+  // needed in setting the raster scale.
+  m_layerTreeView->setPageScaleFactorAndLimits(
+      1, view()->minimumPageScaleFactor(), view()->maximumPageScaleFactor());
 }
 
 void WebFrameWidgetImpl::updateLayerTreeBackgroundColor() {