[devtools] Remove device emulation background color override.

third_party/WebKit/public/web/WebDeviceEmulationParams.h

Index: third_party/WebKit/public/web/WebDeviceEmulationParams.h
diff --git a/third_party/WebKit/public/web/WebDeviceEmulationParams.h b/third_party/WebKit/public/web/WebDeviceEmulationParams.h
index 68b4ff7c06c8bd6bb2c872cf65c0050aaaf3a1c5..f79e1aed2548de94088447a3c724eb7ab4f08e19 100644
--- a/third_party/WebKit/public/web/WebDeviceEmulationParams.h
+++ b/third_party/WebKit/public/web/WebDeviceEmulationParams.h
@@ -50,13 +50,18 @@ struct WebDeviceEmulationParams {
   // Screen orientation angle, used together with screenOrientationType.
   int screen_orientation_angle;
 
+  // Whether to override the gutter color to a dark gray. If enabled, this will
+  // affect the rendering of pages if the page does not set a background color.
+  bool override_gutter_color;
+
   WebDeviceEmulationParams()
       : screen_position(kDesktop),
         device_scale_factor(0),
         fit_to_view(false),
         scale(1),
         screen_orientation_type(kWebScreenOrientationUndefined),
-        screen_orientation_angle(0) {}
+        screen_orientation_angle(0),
+        override_gutter_color(true) {}
 };
 
 inline bool operator==(const WebDeviceEmulationParams& a,
@@ -67,7 +72,8 @@ inline bool operator==(const WebDeviceEmulationParams& a,
          a.view_size == b.view_size && a.fit_to_view == b.fit_to_view &&
          a.offset == b.offset && a.scale == b.scale &&
          a.screen_orientation_type == b.screen_orientation_type &&
-         a.screen_orientation_angle == b.screen_orientation_angle;
+         a.screen_orientation_angle == b.screen_orientation_angle &&
+         a.override_gutter_color == b.override_gutter_color;
 }
 
 inline bool operator!=(const WebDeviceEmulationParams& a,