[PPAPI] Documentation fixes.

ppapi/cpp/mouse_lock.h

Index: ppapi/cpp/mouse_lock.h
diff --git a/ppapi/cpp/mouse_lock.h b/ppapi/cpp/mouse_lock.h
index c743aedaeaeed7c5fdd1757a90dfe57cdf2f3ae9..ed5b07aa832b3221825fc72ee94eec15a2fc241d 100644
--- a/ppapi/cpp/mouse_lock.h
+++ b/ppapi/cpp/mouse_lock.h
@@ -26,16 +26,16 @@ class Instance;
 /// composition.
 ///
 /// <strong>Example (inheritance):</strong>
-/// <code>
+/// @code
 ///   class MyInstance : public pp::Instance, public pp::MouseLock {
 ///     class MyInstance() : pp::MouseLock(this) {
 ///     }
 ///     ...
 ///   };
-/// </code>
+/// @endcode
 ///
 /// <strong>Example (composition):</strong>
-/// <code>
+/// @code
 ///   class MyMouseLock : public pp::MouseLock {
 ///     ...
 ///   };
@@ -46,7 +46,7 @@ class Instance;
 ///
 ///     MyMouseLock mouse_lock_;
 ///   };
-/// </code>
+/// @endcode
 class MouseLock {
  public:
   /// A constructor for creating a <code>MouseLock</code>.