Adds the ability for WebContentsDelegate to decide if event should be updated

chrome/browser/extensions/extension_view_host.cc

Index: chrome/browser/extensions/extension_view_host.cc
diff --git a/chrome/browser/extensions/extension_view_host.cc b/chrome/browser/extensions/extension_view_host.cc
index 5b5d9d4e47da9c99a83769f2a12b7ea617bc5afe..112f79a44f8f227400675aec993f9219a8c6d6bd 100644
--- a/chrome/browser/extensions/extension_view_host.cc
+++ b/chrome/browser/extensions/extension_view_host.cc
@@ -18,6 +18,7 @@
 #include "components/autofill/content/browser/content_autofill_driver_factory.h"
 #include "components/autofill/core/browser/autofill_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
+#include "content/public/browser/keyboard_event_processing_result.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
@@ -173,25 +174,21 @@ bool ExtensionViewHost::ShouldTransferNavigation(
   return !is_main_frame_navigation;
 }
 
-bool ExtensionViewHost::PreHandleKeyboardEvent(
-    WebContents* source,
-    const NativeWebKeyboardEvent& event,
-    bool* is_keyboard_shortcut) {
+content::KeyboardEventProcessingResult
+ExtensionViewHost::PreHandleKeyboardEvent(WebContents* source,
+                                          const NativeWebKeyboardEvent& event) {
   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP &&
       event.type() == NativeWebKeyboardEvent::RawKeyDown &&
       event.windowsKeyCode == ui::VKEY_ESCAPE) {
-    DCHECK(is_keyboard_shortcut != NULL);
-    *is_keyboard_shortcut = true;
-    return false;
+    return content::KeyboardEventProcessingResult::NOT_HANDLED_IS_SHORTCUT;
   }
 
   // Handle higher priority browser shortcuts such as Ctrl-w.
   Browser* browser = view_->GetBrowser();
   if (browser)
-    return browser->PreHandleKeyboardEvent(source, event, is_keyboard_shortcut);
+    return browser->PreHandleKeyboardEvent(source, event);
 
-  *is_keyboard_shortcut = false;
-  return false;
+  return content::KeyboardEventProcessingResult::NOT_HANDLED;
 }
 
 void ExtensionViewHost::HandleKeyboardEvent(