Distinguish between keystroke and character events.

ui/events/event_utils.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_EVENT_UTILS_H_
 #define UI_EVENTS_EVENT_UTILS_H_
 
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_constants.h"
@@ skipping 68 matching lines @@
 // Returns the DOM KeyboardEvent code (physical location in the
 // keyboard) from a native event.  The ownership of the return value
 // is NOT trasferred to the caller.
 EVENTS_EXPORT const char* CodeFromNative(
     const base::NativeEvent& native_event);
 
 // Returns the platform related key code. For X11, it is xksym value.
 EVENTS_EXPORT uint32 PlatformKeycodeFromNative(
     const base::NativeEvent& native_event);
 
+// Returns true if the keyboard event is a character event rather than
+// a keystroke event.
+EVENTS_EXPORT bool IsCharFromNative(const base::NativeEvent& native_event);
+
 // Returns the flags of the button that changed during a press/release.
 EVENTS_EXPORT int GetChangedMouseButtonFlagsFromNative(
     const base::NativeEvent& native_event);
 
 // Gets the mouse wheel offsets from a native event.
 EVENTS_EXPORT gfx::Vector2d GetMouseWheelOffset(
     const base::NativeEvent& native_event);
 
 // Returns a copy of |native_event|. Depending on the platform, this copy may
 // need to be deleted with ReleaseCopiedNativeEvent().
@@ skipping 63 matching lines @@
 EVENTS_EXPORT LPARAM GetLParamFromScanCode(uint16 scan_code);
 
 #endif
 
 // Registers a custom event type.
 EVENTS_EXPORT int RegisterCustomEventType();
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_UTILS_H_