Make accelerators not to work when the keyboard overlay is shown.

ash/wm/partial_screenshot_view.cc

Index: ash/wm/partial_screenshot_view.cc
diff --git a/ash/wm/partial_screenshot_view.cc b/ash/wm/partial_screenshot_view.cc
index 8068971da18a412860528b0c23e3b693a91f07c2..868bdc9c50515a75f3e51917182128eef8c90bae 100644
--- a/ash/wm/partial_screenshot_view.cc
+++ b/ash/wm/partial_screenshot_view.cc
@@ -7,7 +7,7 @@
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
-#include "ash/wm/partial_screenshot_event_filter.h"
+#include "ash/wm/overlay_event_filter.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/gfx/canvas.h"
@@ -54,20 +54,28 @@ void PartialScreenshotView::StartPartialScreenshot(
   // events.  This will close the context menu.
   widget->GetNativeView()->SetCapture();
 
-  Shell::GetInstance()->partial_screenshot_filter()->Activate(view);
+  Shell::GetInstance()->overlay_filter()->Activate(view);
+}
+
+gfx::NativeCursor PartialScreenshotView::GetCursor(
+    const views::MouseEvent& event) {
+  // Always use "crosshair" cursor.
+  return ui::kCursorCross;
 }
 
 void PartialScreenshotView::Cancel() {
-  Shell::GetInstance()->partial_screenshot_filter()->Deactivate();
+  Shell::GetInstance()->overlay_filter()->Deactivate();
   views::Widget* widget = GetWidget();
   if (widget)
     widget->Close();
 }
 
-gfx::NativeCursor PartialScreenshotView::GetCursor(
-    const views::MouseEvent& event) {
-  // Always use "crosshair" cursor.
-  return ui::kCursorCross;
+bool PartialScreenshotView::IsCancelingKeyEvent(aura::KeyEvent* event) {
+  return event->key_code() == ui::VKEY_ESCAPE;
+}
+
+aura::Window* PartialScreenshotView::GetWindow() {
+  return GetWidget()->GetNativeWindow();
 }
 
 void PartialScreenshotView::OnPaint(gfx::Canvas* canvas) {