message: GlShaderSync description fixed
diff: @@ -82,12 +82,10 @@ Status GlSyncWait();
  // (up to tens of ms) but consumes more CPU.
  Status GlActiveSyncWait();
  -// Performs the best available minimum latency finish. A calling thread is not
  -// going to sleep keeping active busy wait.
  -// 1) CPU checks the value in the buffer that is going to be written by GPU. The
  -// persistent buffer is used if the extension is available.
  -// 2) glSync is checked for the signalling state in a loop.
  -// 3) glFinish() is performed if all other methods are not available
  +// CPU checks the value in the buffer that is going to be written by GPU. The
  +// persistent buffer is used for the simultaneous access to the buffer by GPU
  +// and CPU. The instance remains invalid if persistent buffer OpenGL extension
  +// is not supported by the device.
  class GlShaderSync {
  public:
  static Status NewSync(GlShaderSync* gl_sync);
  