[PPAPI] Fix a bunch of spelling mistakes

ppapi/cpp/graphics_2d.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 PPAPI_CPP_GRAPHICS_2D_H_
 #define PPAPI_CPP_GRAPHICS_2D_H_
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/cpp/resource.h"
 #include "ppapi/cpp/size.h"
@@ skipping 40 matching lines @@
   /// If you set <code>is_always_opaque</code>, your alpha channel should
   /// always be set to 0xFF or there may be painting artifacts. The alpha values
   /// overwrite the destination alpha values without blending when
   /// <code>is_always_opaque</code> is true.
   Graphics2D(const InstanceHandle& instance,
              const Size& size,
              bool is_always_opaque);
 
   /// A destructor that decrements the reference count of a
   /// <code>Graphics2D</code> object made using the previous copy constructor.
-  /// It is possible that the destructor does not toally destroy the underlying
+  /// It is possible that the destructor does not totally destroy the underlying
   /// 2D context if there are outstanding references to it.
   virtual ~Graphics2D();
 
   /// This function assigns one 2D graphics context to this 2D graphics
   /// context. This function increases the reference count of the 2D resource
   /// of the other 2D graphics context while decrementing the reference counter
   /// of this 2D graphics context.
   ///
   /// @param[in] other An other 2D graphics context.
   ///
@@ skipping 188 matching lines @@
   // for it.
   int32_t Flush(const CompletionCallback& cc);
 
  private:
   Size size_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_GRAPHICS_2D_H_