Initial CL to create GrBatchTest infrastructure

src/gpu/GrTestUtils.cpp

Index: src/gpu/GrTestUtils.cpp
diff --git a/src/gpu/GrTestUtils.cpp b/src/gpu/GrTestUtils.cpp
index c132663d2020d1b45c2f27be6065b0faac4a32ae..afd9fd80b6787a5f010d965e932e6205907afda8 100644
--- a/src/gpu/GrTestUtils.cpp
+++ b/src/gpu/GrTestUtils.cpp
@@ -8,6 +8,8 @@
 #include "GrTestUtils.h"
 #include "SkMatrix.h"
 
+#ifdef GR_TEST_UTILS
+
 namespace GrTest {
 const SkMatrix& TestMatrix(SkRandom* random) {
     static SkMatrix gMatrices[5];
@@ -26,4 +28,21 @@ const SkMatrix& TestMatrix(SkRandom* random) {
     }
     return gMatrices[random->nextULessThan(static_cast<uint32_t>(SK_ARRAY_COUNT(gMatrices)))];
 }
+
+const SkRect& TestRect(SkRandom* random) {
+    static SkRect gRects[1];

[brucedawson, 2015/04/30 20:19:35]

Why is this array declared as having just one element when seven elements are
referenced down below? This triggers a series of /analyze warnings, including
this one:

src\third_party\skia\src\gpu\grtestutils.cpp(67) : warning C6201: Index '6' is
out of valid index range '0' to '0' for possibly stack allocated buffer 'struct
SkRect * `struct SkRect const & __cdecl GrTest::TestRect(class SkRandom
*)'::`2'::gRects'.

+    static bool gOnce;
+    if (!gOnce) {
+        gRects[0] = SkRect::MakeWH(1.f, 1.f);
+        gRects[1] = SkRect::MakeWH(1.0f, 256.0f);
+        gRects[2] = SkRect::MakeWH(256.0f, 1.0f);
+        gRects[4] = SkRect::MakeLargest();
+        gRects[5] = SkRect::MakeLTRB(-65535.0f, -65535.0f, 65535.0f, 65535.0f);
+        gRects[6] = SkRect::MakeLTRB(10.0f, 10.0f, -10.0f, -10.0f);
+        gOnce = true;
+    }
+    return gRects[random->nextULessThan(static_cast<uint32_t>(SK_ARRAY_COUNT(gRects)))];
+}
 };
+
+#endif