Android ScreenCapture: add support to device rotation.

media/capture/content/android/screen_capture_machine_android.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_CAPTURE_CONTENT_ANDROID_SCREEN_CAPTURE_MACHINE_ANDROID_H_
 #define MEDIA_CAPTURE_CONTENT_ANDROID_SCREEN_CAPTURE_MACHINE_ANDROID_H_
 
 #include <jni.h>
 #include <memory>
 
 #include "base/android/scoped_java_ref.h"
+#include "media/capture/capture_export.h"
 #include "media/capture/content/screen_capture_device_core.h"
 
 namespace media {
 
 // ScreenCaptureMachineAndroid captures 32bit RGB or YUV420 triplanar.
-class ScreenCaptureMachineAndroid : public media::VideoCaptureMachine {
+class CAPTURE_EXPORT ScreenCaptureMachineAndroid : public VideoCaptureMachine {
  public:
   ScreenCaptureMachineAndroid();
   ~ScreenCaptureMachineAndroid() override;
 
   static bool RegisterScreenCaptureMachine(JNIEnv* env);
   static base::android::ScopedJavaLocalRef<jobject>
   createScreenCaptureMachineAndroid(jlong nativeScreenCaptureMachineAndroid);
 
   // Implement org.chromium.media.ScreenCapture.nativeOnRGBAFrameAvailable.
   void OnRGBAFrameAvailable(JNIEnv* env,
@@ skipping 16 matching lines @@
                             jint uv_pixel_stride,
                             jint left,
                             jint top,
                             jint width,
                             jint height,
                             jlong timestamp);
 
   // Implement org.chromium.media.ScreenCapture.nativeOnActivityResult.
   void OnActivityResult(JNIEnv* env, jobject obj, jboolean result);
 
+  // Implement org.chromium.media.ScreenCaptuer.nativeOnOrientationChange.
+  void OnOrientationChange(JNIEnv* env, jobject obj, jint rotation);
+
   // VideoCaptureMachine overrides.
   void Start(const scoped_refptr<media::ThreadSafeCaptureOracle>& oracle_proxy,
              const media::VideoCaptureParams& params,
              const base::Callback<void(bool)> callback) override;
   void Stop(const base::Closure& callback) override;
   void MaybeCaptureForRefresh() override;
 
  private:
+  // Indicates the orientation of the device.
+  enum DeviceOrientation { kLandscape, kPortrait, kDefault };
+
   // Makes all the decisions about which frames to copy, and how.
   scoped_refptr<media::ThreadSafeCaptureOracle> oracle_proxy_;
 
   // Cache the last frame for possible refreshing.
   scoped_refptr<VideoFrame> lastFrame_;
 
   // Java VideoCaptureAndroid instance.
   base::android::ScopedJavaLocalRef<jobject> j_capture_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenCaptureMachineAndroid);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_CONTENT_ANDROID_SCREEN_CAPTURE_MACHINE_ANDROID_H_