[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/examples/mouselock/mouselock.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.
 
 #include <cmath>
 
 #include "ppapi/c/ppb_fullscreen.h"
 #include "ppapi/c/ppb_input_event.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/fullscreen.h"
@@ skipping 60 matching lines @@
   void DidFlush(int32_t result);
 
   // Creates a new paint buffer, paints it then flush it to the 2D context.  If
   // a flush is pending, this does nothing.
   void Paint();
 
   // Create a new pp::ImageData and paint the graphics that represent the mouse
   // movement in it.  Return the new pp::ImageData.
   pp::ImageData PaintImage(const pp::Size& size);
 
-  // Fill the image with the backgroud color.
+  // Fill the image with the background color.
   void ClearToBackground(pp::ImageData* image);
 
   void DrawCenterSpot(pp::ImageData* image, uint32_t spot_color);
 
   void DrawNeedle(pp::ImageData* image, uint32_t needle_color);
 
   // Print the printf-style format to the "console" via PostMessage.
   void Log(const char* format, ...);
 
   pp::Size size_;
 
   bool mouse_locked_;
   pp::Point mouse_movement_;
   bool waiting_for_flush_completion_;
   pp::CompletionCallbackFactory<MouseLockInstance> callback_factory_;
 
   pp::Fullscreen fullscreen_;
   pp::Graphics2D device_context_;
   bool is_context_bound_;
   bool was_fullscreen_;
   uint32_t* background_scanline_;
 };
 
 }  // namespace mouselock