Picture Recording: fix the performance bottleneck in SkDeferredCanvas::isFullFrame

tests/DeferredCanvasTest.cpp

Index: tests/DeferredCanvasTest.cpp
diff --git a/tests/DeferredCanvasTest.cpp b/tests/DeferredCanvasTest.cpp
index b8b82b2e8329429c31a052f24af8871a74e4021a..ada9a9b9384cdd793887b70999f27c1666e01629 100644
--- a/tests/DeferredCanvasTest.cpp
+++ b/tests/DeferredCanvasTest.cpp
@@ -291,7 +291,21 @@ static void TestDeferredCanvasFreshFrame(skiatest::Reporter* reporter) {
     canvas->clear(0x00000000);
     canvas->restore();
     REPORTER_ASSERT(reporter, canvas->isFreshFrame());
+}
+
+static void TestDeferredCanvasFreshFrameWithDrawOps(skiatest::Reporter* reporter) {
+    SkRect fullRect;
+    fullRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(gWidth),
+        SkIntToScalar(gHeight));
+    SkRect partialRect;
+    partialRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0),
+        SkIntToScalar(1), SkIntToScalar(1));
+
+    SkAutoTUnref<SkSurface> surface(createSurface(0xFFFFFFFF));
+    SkAutoTUnref<SkDeferredCanvas> canvas(SkDeferredCanvas::Create(surface.get()));
 
+    // We have verified that the frame is initially fresh, So It will get
+    // the canvasSize, and reuse this canvasSize if the frame is not fresh.
     // Verify that full frame rects with different forms of opaque paint
     // trigger frames to be marked as fresh
     {
@@ -843,6 +857,7 @@ DEF_TEST(DeferredCanvas_CPU, reporter) {
     TestDeferredCanvasFlush(reporter);
     TestDeferredCanvasSilentFlush(reporter);
     TestDeferredCanvasFreshFrame(reporter);
+    TestDeferredCanvasFreshFrameWithDrawOps(reporter);
     TestDeferredCanvasMemoryLimit(reporter);
     TestDeferredCanvasBitmapCaching(reporter);
     TestDeferredCanvasSkip(reporter);