Update to Chromium revision 614d31da (#423768)

- Fix PDF extension loading after showing the plugin placeholder (issue #2020)

patch/patches/views_1749.patch

@@ -56,7 +56,7 @@ index 696a941..ce5abcd 100644
    // The time is used for simulating menu behavior for the menu button; that
    // is, if the menu is shown and the button is pressed, we need to close the
 diff --git view.h view.h
-index 55cc02b..c402f55 100644
+index 28171db..747930c 100644
 --- view.h
 +++ view.h
 @@ -18,6 +18,7 @@
@@ -67,7 +67,7 @@ index 55cc02b..c402f55 100644
  #include "build/build_config.h"
  #include "ui/accessibility/ax_enums.h"
  #include "ui/base/accelerators/accelerator.h"
-@@ -112,7 +113,8 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
+@@ -113,7 +114,8 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
                            public ui::LayerOwner,
                            public ui::AcceleratorTarget,
                            public ui::EventTarget,