Split GrUnitTests.cpp into two separate unit tests.

tests/GrTBSearchTest.cpp

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// This is a GPU-backend specific test
+#if SK_SUPPORT_GPU
+
+#include "Test.h"
+
+// If we aren't inheriting these as #defines from elsewhere,
+// clang demands they be declared before we #include the template
+// that relies on them.
+static bool LT(const int& elem, int value) {
+    return elem < value;
+}
+static bool EQ(const int& elem, int value) {
+    return elem == value;
+}
+
+#include "GrTBSearch.h"
+
+DEF_TEST(GrTBSearchTest, reporter) {
+    const int array[] = {
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99
+    };
+
+    for (int n = 0; n < static_cast<int>(SK_ARRAY_COUNT(array)); ++n) {
+        for (int i = 0; i < n; i++) {
+            int index = GrTBSearch<int, int>(array, n, array[i]);
+            REPORTER_ASSERT(reporter, index == (int) i);
+            index = GrTBSearch<int, int>(array, n, -array[i]);
+            REPORTER_ASSERT(reporter, index < 0);
+        }
+    }
+}
+
+#endif