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

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index 4b8b1c22cb687cd446f22fddb6db3bdb214419eb..c9083b4bd5ca92f00f85d4a185b4bb1c128bfdfc 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -873,6 +873,8 @@ bool RenderViewHostImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeChanged, OnFocusedNodeChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ClosePage_ACK, OnClosePageACK)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidZoomURL, OnDidZoomURL)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_PageScaleFactorIsOneChanged,
+                        OnPageScaleFactorIsOneChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RunFileChooser, OnRunFileChooser)
     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeTouched, OnFocusedNodeTouched)
     // Have the super handle all other messages.
@@ -1348,6 +1350,19 @@ void RenderViewHostImpl::OnDidZoomURL(double zoom_level,
                                      net::GetHostOrSpecFromURL(url));
 }
 
+void RenderViewHostImpl::OnPageScaleFactorIsOneChanged(bool is_one) {
+  if (!GetSiteInstance())
+    return;
+  HostZoomMapImpl* host_zoom_map =
+      static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
+  if (!host_zoom_map)
+    return;
+  if (!GetProcess())
+    return;
+  host_zoom_map->SetPageScaleFactorIsOneForView(GetProcess()->GetID(),
+                                                GetRoutingID(), is_one);
+}
+
 void RenderViewHostImpl::OnRunFileChooser(const FileChooserParams& params) {
   // Do not allow messages with absolute paths in them as this can permit a
   // renderer to coerce the browser to perform I/O on a renderer controlled