Fix mouse wheel scrolling on PDFs.

third_party/WebKit/Source/web/WebSettingsImpl.cpp

Index: third_party/WebKit/Source/web/WebSettingsImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSettingsImpl.cpp b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
index 44ffa9d082e2cb2feebc7d763c1e765cee3dfb2a..b464582aeb80c98f96373987a456e50dc2113546 100644
--- a/third_party/WebKit/Source/web/WebSettingsImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
@@ -208,6 +208,11 @@ void WebSettingsImpl::setWebSecurityEnabled(bool enabled)
     m_settings->setWebSecurityEnabled(enabled);
 }
 
+void WebSettingsImpl::setWheelGesturesEnabled(bool enabled)
+{
+    m_settings->setWheelGesturesEnabled(enabled);
+}
+
 void WebSettingsImpl::setJavaScriptCanOpenWindowsAutomatically(bool canOpenWindows)
 {
     m_settings->setJavaScriptCanOpenWindowsAutomatically(canOpenWindows);
@@ -692,6 +697,11 @@ bool WebSettingsImpl::mockGestureTapHighlightsEnabled() const
     return m_settings->mockGestureTapHighlightsEnabled();
 }
 
+bool WebSettingsImpl::wheelGesturesEnabled() const
+{
+    return m_settings->wheelGesturesEnabled();
+}
+
 bool WebSettingsImpl::mainFrameResizesAreOrientationChanges() const
 {
     return m_devToolsEmulator->mainFrameResizesAreOrientationChanges();