Fix issue where video scaling gets stuck at low resolution

webrtc/media/base/videoadapter_unittest.cc

Index: webrtc/media/base/videoadapter_unittest.cc
diff --git a/webrtc/media/base/videoadapter_unittest.cc b/webrtc/media/base/videoadapter_unittest.cc
index 0bfb6c650392e18b34fa97c67aa19000066ffdd6..6ec90d841d26d77d8d8d9135a2e831c06bbf030d 100644
--- a/webrtc/media/base/videoadapter_unittest.cc
+++ b/webrtc/media/base/videoadapter_unittest.cc
@@ -1016,4 +1016,17 @@ TEST_F(VideoAdapterTest, AdaptFrameResolutionDropWithResolutionRequest) {
       &out_width_, &out_height_));
 }
 
+// Test that we will adapt to max given a target pixel count close to max.
+TEST_F(VideoAdapterTest, TestAdaptToMax) {
+  adapter_.OnOutputFormatRequest(VideoFormat(640, 360, 0, FOURCC_I420));
+  adapter_.OnResolutionRequest(rtc::Optional<int>(640 * 360 - 1) /* target */,
+                               rtc::Optional<int>());
+
+  EXPECT_TRUE(adapter_.AdaptFrameResolution(640, 360, 0, &cropped_width_,
+                                            &cropped_height_, &out_width_,
+                                            &out_height_));
+  EXPECT_EQ(640, out_width_);
+  EXPECT_EQ(360, out_height_);
+}
+
 }  // namespace cricket