Set WebFont priority to very low if the network is detected to be slow

third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp

Index: third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
diff --git a/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp b/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
index e6f9a8c7845dd7d7ec5e0fb09577a04afb6d853a..ac48e7bb40087b8e33094a3699ab1e9992829a2a 100644
--- a/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
+++ b/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
@@ -17,6 +17,7 @@
 #include "platform/fonts/FontCache.h"
 #include "platform/fonts/FontDescription.h"
 #include "platform/fonts/SimpleFontData.h"
+#include "platform/network/ResourceLoadPriority.h"
 #include "public/platform/WebEffectiveConnectionType.h"
 #include "wtf/CurrentTime.h"
 
@@ -73,6 +74,10 @@ RemoteFontFaceSource::RemoteFontFaceSource(FontResource* font,
         OtherMessageSource, InfoMessageLevel,
         "Slow network is detected. Fallback font will be used while loading: " +
             m_font->url().elidedString()));
+    if (!font->url().protocolIsData() && !font->isLoaded() &&

[Takashi Toyoshima, 2016/11/14 03:53:56]

|font| is shared by multiple RemoteFontFaceSource instances.
So we may need to lower the priority only when all clients agreed.

[tbansal1, 2016/11/14 20:12:08]

Done.

+        m_display == FontDisplayAuto) {
+      m_font->didChangePriority(ResourceLoadPriorityVeryLow, 0);
+    }
   }
 }