libgui: Fix the tests so they build.

Change-Id: I7205b0819e5801ac549109ff562c3ab1b113d176
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index fd07479..440a48b 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -30,7 +30,7 @@
         mComposerClient = new SurfaceComposerClient;
         ASSERT_EQ(NO_ERROR, mComposerClient->initCheck());
 
-        mSurfaceControl = mComposerClient->createSurface(getpid(),
+        mSurfaceControl = mComposerClient->createSurface(
                 String8("Test Surface"), 0, 32, 32, PIXEL_FORMAT_RGB_888, 0);
 
         ASSERT_TRUE(mSurfaceControl != NULL);