Unset the page-scale-factor limits if enable-pinch flag is turned on.

webkit/glue/webpreferences.cc

Index: webkit/glue/webpreferences.cc
diff --git a/webkit/glue/webpreferences.cc b/webkit/glue/webpreferences.cc
index 883da73b9583c104ee72accfb40f128538e2d781..3b971245ff88d789e327b87d7a16ee28509e3398 100644
--- a/webkit/glue/webpreferences.cc
+++ b/webkit/glue/webpreferences.cc
@@ -110,7 +110,8 @@ WebPreferences::WebPreferences()
       default_tile_width(256),
       default_tile_height(256),
       max_untiled_layer_width(512),
-      max_untiled_layer_height(512) {
+      max_untiled_layer_height(512),
+      force_enable_page_scale(false) {
   standard_font_family_map[kCommonScript] =
       ASCIIToUTF16("Times New Roman");
   fixed_font_family_map[kCommonScript] =
@@ -199,6 +200,7 @@ void WebPreferences::Apply(WebView* web_view) const {
   settings->setMinimumFontSize(minimum_font_size);
   settings->setMinimumLogicalFontSize(minimum_logical_font_size);
   settings->setDefaultDeviceScaleFactor(default_device_scale_factor);
+  settings->setForceEnablePageScaleFactor(force_enable_page_scale);
   settings->setDefaultTextEncodingName(ASCIIToUTF16(default_encoding));
   settings->setApplyDefaultDeviceScaleFactorInCompositor(
       apply_default_device_scale_factor_in_compositor);