[PPAPI] Fix a bunch of spelling mistakes

ppapi/cpp/var_array_buffer.h

Index: ppapi/cpp/var_array_buffer.h
diff --git a/ppapi/cpp/var_array_buffer.h b/ppapi/cpp/var_array_buffer.h
index 74f97aaa11111b049109f15e07eda30be3b74317..fd2b05b04cf0ed4e43cfd9d4cbdad551180e8e51 100644
--- a/ppapi/cpp/var_array_buffer.h
+++ b/ppapi/cpp/var_array_buffer.h
@@ -19,7 +19,7 @@ namespace pp {
 /// <code>HandleMessage</code> functions of <code>Instance</code>.
 class VarArrayBuffer : public Var {
  public:
-  /// Contruct a <code>VarArrayBuffer</code> given a var for which
+  /// Construct a <code>VarArrayBuffer</code> given a var for which
   /// is_array_buffer() is true. This will refer to the same
   /// <code>ArrayBuffer</code> as var, but allows you to access methods
   /// specific to <code>VarArrayBuffer</code>.