Revert of Fix the mobile emulator to use the correct device scale when...

Revert of Fix the mobile emulator to use the correct device scale when disabled. (patchset #1 id:1 of https://codereview.chromium.org/2168313002/ )

Reason for revert:
Likely cause of webkit_tests unexpected_failures
inspector/screen-orientation-override.html

https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux/67873/layout-test-results/results.html

Failure appeared on many bots:
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Linux/builds/67873
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Linux%20Trusty/builds/15157
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Mac10.10/builds/21002
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Mac10.11/builds/7468
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win10/builds/12746

and it seems related (change to devtools, failure in "inspector")

Original issue's description:
> Fix the mobile emulator to use the correct device scale when disabled.
>
> The mobile emulator was triggering a layout before it had reapplied the
> original viewport parameters when it was being disabled, which with
> use-zoom-for-dsf enabled was causing the wrong viewport size to be given
> to various components, like plugins and scrollbars.
>
> BUG=628501,628185
>
> Committed: https://crrev.com/d89c7a1578f9f16f6e1fa4375aab232b67fe0f9f
> Cr-Commit-Position: refs/heads/master@{#407294}

TBR=dgozman@chromium.org,alph@chromium.org,bsep@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=628501,628185

Review-Url: https://codereview.chromium.org/2174493004
Cr-Commit-Position: refs/heads/master@{#407314}

content/renderer/devtools/render_widget_screen_metrics_emulator.cc

@@ -25,10 +25,10 @@ RenderWidgetScreenMetricsEmulator::RenderWidgetScreenMetricsEmulator(
 }
 
 RenderWidgetScreenMetricsEmulator::~RenderWidgetScreenMetricsEmulator() {
-  delegate_->Resize(original_resize_params_);
   delegate_->SetScreenMetricsEmulationParameters(false, emulation_params_);
   delegate_->SetScreenRects(original_view_screen_rect_,
                             original_window_screen_rect_);
+  delegate_->Resize(original_resize_params_);
 }
 
 void RenderWidgetScreenMetricsEmulator::ChangeEmulationParams(