Enable pinch-zoom on the new login page.

extensions/browser/api/web_view/web_view_internal_api.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/api/web_view/web_view_internal_api.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 168 matching lines @@
 bool WebViewInternalSetAllowTransparencyFunction::RunAsyncSafe(
     WebViewGuest* guest) {
   scoped_ptr<webview::SetAllowTransparency::Params> params(
       webview::SetAllowTransparency::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
   guest->SetAllowTransparency(params->allow);
   SendResponse(true);
   return true;
 }
 
+WebViewInternalSetAllowScalingFunction::
+    WebViewInternalSetAllowScalingFunction() {
+}
+
+WebViewInternalSetAllowScalingFunction::
+    ~WebViewInternalSetAllowScalingFunction() {
+}
+
+bool WebViewInternalSetAllowScalingFunction::RunAsyncSafe(WebViewGuest* guest) {
+  scoped_ptr<webview::SetAllowScaling::Params> params(
+      webview::SetAllowScaling::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+  guest->SetAllowScaling(params->allow);
+  SendResponse(true);
+  return true;
+}
+
 WebViewInternalSetZoomFunction::WebViewInternalSetZoomFunction() {
 }
 
 WebViewInternalSetZoomFunction::~WebViewInternalSetZoomFunction() {
 }
 
 bool WebViewInternalSetZoomFunction::RunAsyncSafe(WebViewGuest* guest) {
   scoped_ptr<webview::SetZoom::Params> params(
       webview::SetZoom::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
@@ skipping 294 matching lines @@
   // Will finish asynchronously.
   return true;
 }
 
 void WebViewInternalClearDataFunction::ClearDataDone() {
   Release();  // Balanced in RunAsync().
   SendResponse(true);
 }
 
 }  // namespace extensions