Replace "GL" naming with "GPU".

Test: Manual testing with Chrome.

Change-Id: Ib9c861f27c59ed17bd2155d9b8b4224cd90e8935
diff --git a/include/system/window.h b/include/system/window.h
index 9a58ca4..c340773 100644
--- a/include/system/window.h
+++ b/include/system/window.h
@@ -1054,14 +1054,14 @@
         struct ANativeWindow* window, uint64_t frameId,
         int64_t* outRequestedPresentTime, int64_t* outAcquireTime,
         int64_t* outLatchTime, int64_t* outFirstRefreshStartTime,
-        int64_t* outLastRefreshStartTime, int64_t* outGlCompositionDoneTime,
+        int64_t* outLastRefreshStartTime, int64_t* outGpuCompositionDoneTime,
         int64_t* outDisplayPresentTime, int64_t* outDisplayRetireTime,
         int64_t* outDequeueReadyTime, int64_t* outReleaseTime)
 {
     return window->perform(window, NATIVE_WINDOW_GET_FRAME_TIMESTAMPS,
             frameId, outRequestedPresentTime, outAcquireTime, outLatchTime,
             outFirstRefreshStartTime, outLastRefreshStartTime,
-            outGlCompositionDoneTime, outDisplayPresentTime,
+            outGpuCompositionDoneTime, outDisplayPresentTime,
             outDisplayRetireTime, outDequeueReadyTime, outReleaseTime);
 }