add enable/disable switch for link prefetch to WebSettings

Bug: 5218987
Change-Id: Ie88a117e52d1835114415ee6721108d8a882594a

3 files changed, 20 insertions, 0 deletions

diff --git a/Source/WebCore/loader/cache/CachedResourceLoader.cpp b/Source/WebCore/loader/cache/CachedResourceLoader.cpp
index 91c0629..fe25a93 100644
--- a/Source/WebCore/loader/cache/CachedResourceLoader.cpp
+++ b/Source/WebCore/loader/cache/CachedResourceLoader.cpp
@@ -293,6 +293,8 @@ bool CachedResourceLoader::canRequest(CachedResource::Type type, const KURL& url
     }
 #if ENABLE(LINK_PREFETCH)
     case CachedResource::LinkResource:
+        if (!m_document->settings()->linkPrefetchEnabled())
+            return false;
         break;
 #endif
     }
diff --git a/Source/WebCore/page/Settings.cpp b/Source/WebCore/page/Settings.cpp
index c26a0fc..f668f3e 100644
--- a/Source/WebCore/page/Settings.cpp
+++ b/Source/WebCore/page/Settings.cpp
@@ -149,6 +149,9 @@ Settings::Settings(Page* page)
     // they can't use by. Leaving enabled for now to not change existing behavior.
     , m_downloadableBinaryFontsEnabled(true)
     , m_xssAuditorEnabled(false)
+#if ENABLE(LINK_PREFETCH)
+    , m_linkPrefetchEnabled(true)
+#endif
     , m_acceleratedCompositingEnabled(true)
     , m_acceleratedCompositingFor3DTransformsEnabled(true)
     , m_acceleratedCompositingForVideoEnabled(true)
@@ -823,6 +826,13 @@ void Settings::setXSSAuditorEnabled(bool xssAuditorEnabled)
     m_xssAuditorEnabled = xssAuditorEnabled;
 }
 
+#if ENABLE(LINK_PREFETCH)
+void Settings::setLinkPrefetchEnabled(bool linkPrefetchEnabled)
+{
+    m_linkPrefetchEnabled = linkPrefetchEnabled;
+}
+#endif
+
 void Settings::setAcceleratedCompositingEnabled(bool enabled)
 {
     if (m_acceleratedCompositingEnabled == enabled)
diff --git a/Source/WebCore/page/Settings.h b/Source/WebCore/page/Settings.h
index 2bb222d..2cf7715 100644
--- a/Source/WebCore/page/Settings.h
+++ b/Source/WebCore/page/Settings.h
@@ -352,6 +352,11 @@ namespace WebCore {
         void setXSSAuditorEnabled(bool);
         bool xssAuditorEnabled() const { return m_xssAuditorEnabled; }
 
+#if ENABLE(LINK_PREFETCH)
+        void setLinkPrefetchEnabled(bool);
+        bool linkPrefetchEnabled() const { return m_linkPrefetchEnabled; }
+#endif
+
         void setCanvasUsesAcceleratedDrawing(bool);
         bool canvasUsesAcceleratedDrawing() const { return m_canvasUsesAcceleratedDrawing; }
 
@@ -567,6 +572,9 @@ namespace WebCore {
         bool m_acceleratedDrawingEnabled : 1;
         bool m_downloadableBinaryFontsEnabled : 1;
         bool m_xssAuditorEnabled : 1;
+#if ENABLE(LINK_PREFETCH)
+        bool m_linkPrefetchEnabled : 1;
+#endif
         bool m_acceleratedCompositingEnabled : 1;
         bool m_acceleratedCompositingFor3DTransformsEnabled : 1;
         bool m_acceleratedCompositingForVideoEnabled : 1;