[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/examples/fullscreen_tumbler/opengl_context.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 EXAMPLES_TUMBLER_OPENGL_CONTEXT_H_
 #define EXAMPLES_TUMBLER_OPENGL_CONTEXT_H_
 
 ///
 /// @file
 /// OpenGLContext manages the OpenGL context in the browser that is associated
@@ skipping 19 matching lines @@
 /// OpenGLContext manages an OpenGL rendering context in the browser.
 ///
 class OpenGLContext : public pp::Graphics3DClient {
  public:
   explicit OpenGLContext(pp::Instance* instance);
 
   /// Release all the in-browser resources used by this context, and make this
   /// context invalid.
   virtual ~OpenGLContext();
 
-  /// The Graphics3DClient interfcace.
+  /// The Graphics3DClient interface.
   virtual void Graphics3DContextLost() {
     assert(!"Unexpectedly lost graphics context");
   }
 
   /// Make @a this the current 3D context in @a instance.
   /// @param instance The instance of the NaCl module that will receive the
   ///                 the current 3D context.
   /// @return success.
   bool MakeContextCurrent(pp::Instance* instance);
 
@@ skipping 35 matching lines @@
   bool flush_pending_;
 
   const struct PPB_OpenGLES2* gles2_interface_;
 };
 
 }  // namespace tumbler
 
 #endif  // EXAMPLES_TUMBLER_OPENGL_CONTEXT_H_