Add Null checks in VideoCaptureCamera2.java

media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java

Index: media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java
diff --git a/media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java b/media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java
index 5919ed1da303d5e3b7eacadf8b2b87f452515b56..1d5277c89545027361a0cafcb7ea8831923d29ae 100644
--- a/media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java
+++ b/media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java
@@ -268,7 +268,10 @@ public class VideoCaptureCamera2 extends VideoCapture {
                         @Override
                         public void onCaptureCompleted(CameraCaptureSession session,
                                 CaptureRequest request, TotalCaptureResult result) {
-                            mLastExposureTimeNs = result.get(CaptureResult.SENSOR_EXPOSURE_TIME);
+                            if (result.get(CaptureResult.SENSOR_EXPOSURE_TIME) != null) {
+                                mLastExposureTimeNs =
+                                        result.get(CaptureResult.SENSOR_EXPOSURE_TIME);
+                            }
                         }
                     }, handler);
 
@@ -762,7 +765,9 @@ public class VideoCaptureCamera2 extends VideoCapture {
             maxIso = iso_range.getUpper();
         }
         builder.setMinIso(minIso).setMaxIso(maxIso).setStepIso(1);
-        builder.setCurrentIso(mPreviewRequestBuilder.get(CaptureRequest.SENSOR_SENSITIVITY));
+        if (mPreviewRequestBuilder.get(CaptureRequest.SENSOR_SENSITIVITY) != null) {

[mcasas, 2017/06/10 14:47:26]

micro-nit: perhaps mention here in a comment the bug 
leading to these extra checks? Either way it's fine.

+            builder.setCurrentIso(mPreviewRequestBuilder.get(CaptureRequest.SENSOR_SENSITIVITY));
+        }
 
         final StreamConfigurationMap streamMap =
                 cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);