Implementation of device metrics emulation in render view.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
===================================================================
--- content/renderer/render_view_impl.cc	(revision 217537)
+++ content/renderer/render_view_impl.cc	(working copy)
@@ -2363,6 +2363,8 @@
 WebWidget* RenderViewImpl::createPopupMenu(WebKit::WebPopupType popup_type) {
   RenderWidget* widget =
       RenderWidget::Create(routing_id_, popup_type, screen_info_);
+  if (device_emulation_helper_)
+    device_emulation_helper_->PopupCreated(this, widget);
   return widget->webwidget();
 }
 
@@ -2440,6 +2442,26 @@
   plugin->initializeFrame(main_render_frame_.get());
 }
 
+void RenderViewImpl::emulateDevice(
+    bool enabled,
+    const WebKit::WebSize& device_size,
+    const WebKit::WebRect& view_rect,
+    float device_scale_factor,
+    bool fit_to_view) {
+  if (enabled && webview()) {
+    webview()->settings()->setViewportEnabled(true);
+    webview()->enableFixedLayoutMode(true);
+    webview()->settings()->setForceCompositingMode(true);
+  }
+  EmulateDevice(enabled, gfx::Size(device_size), gfx::Rect(view_rect),
+      device_scale_factor, fit_to_view);
+  if (!enabled && webview()) {
+    webview()->settings()->setForceCompositingMode(false);

[aelias_OOO_until_Jul13, 2013/09/05 08:26:49]

This one is usually true on desktop as well, this would clobber it.

[dgozman, 2013/09/10 19:54:02]

Nice catch, thanks!

+    webview()->enableFixedLayoutMode(false);
+    webview()->settings()->setViewportEnabled(false);
+  }
+}
+
 void RenderViewImpl::didStartLoading() {
   if (is_loading_) {
     DVLOG(1) << "didStartLoading called while loading";