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 221161)
+++ content/renderer/render_view_impl.cc	(working copy)
@@ -2361,6 +2361,8 @@
 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();
 }
 
@@ -2455,6 +2457,23 @@
   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()->setForceCompositingMode(true);
+  EmulateDevice(enabled, gfx::Size(device_size), gfx::Rect(view_rect),
+      device_scale_factor, fit_to_view);
+}
+
+void RenderViewImpl::SetDeviceEmulationScale(float scale) {
+  if (webview() && webview()->devToolsAgent())
+    webview()->devToolsAgent()->setDeviceEmulationScale(scale);
+}
+
 void RenderViewImpl::didStartLoading() {
   if (is_loading_) {
     DVLOG(1) << "didStartLoading called while loading";
@@ -2655,6 +2674,8 @@
     params.x = touch_editing_context_menu_location_.x();
     params.y = touch_editing_context_menu_location_.y();
   }
+  if (device_emulation_helper_)
+    device_emulation_helper_->OnShowContextMenu(this, &params);
 
   // Plugins, e.g. PDF, don't currently update the render view when their
   // selected text changes, but the context menu params do contain the updated