Make command-zero reset page scale in addition to zoom level

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index ff17a2c1096494fe2c680ba5bb288743ca27ca88..1625617e73a6e8efce2290e857d1f75d2de5b4a3 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1296,6 +1296,7 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ViewMsg_SaveImageAt, OnSaveImageAt)
     IPC_MESSAGE_HANDLER(ViewMsg_Find, OnFind)
     IPC_MESSAGE_HANDLER(ViewMsg_StopFinding, OnStopFinding)
+    IPC_MESSAGE_HANDLER(ViewMsg_ResetPageScale, OnResetPageScale)
     IPC_MESSAGE_HANDLER(ViewMsg_Zoom, OnZoom)
     IPC_MESSAGE_HANDLER(ViewMsg_SetZoomLevelForLoadingURL,
                         OnSetZoomLevelForLoadingURL)
@@ -2736,6 +2737,12 @@ void RenderViewImpl::OnFindMatchRects(int current_version) {
 }
 #endif
 
+void RenderViewImpl::OnResetPageScale() {
+  if (!webview())
+    return;
+  webview()->setPageScaleFactor(1);
+}
+
 void RenderViewImpl::OnZoom(PageZoom zoom) {
   if (!webview())  // Not sure if this can happen, but no harm in being safe.
     return;