Move call to ProcessViewLayoutFlags().

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 c533788c961a49fb09d42a0029d81278db61f495..2f57b828cd42696a3295aea591922c5ad32b5a22 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -3546,6 +3546,9 @@ void RenderViewImpl::ProcessViewLayoutFlags(const CommandLine& command_line) {
   if (enable_viewport)
     return;
 
+  // When navigating to a new page, reset the page scale factor to be 1.0.
+  webview()->setInitialPageScaleOverride(1.f);
+
   if (enable_fixed_layout) {
     std::string str =
         command_line.GetSwitchValueASCII(switches::kEnableFixedLayout);