Basic use implementation for MediaStream from Canvas: captureStream()

content/renderer/renderer_blink_platform_impl.h

Index: content/renderer/renderer_blink_platform_impl.h
diff --git a/content/renderer/renderer_blink_platform_impl.h b/content/renderer/renderer_blink_platform_impl.h
index 247b97cea76b1a8768ca50fce40e205b07a49b73..b69a6b3798bad003dfcd82d40c281695c9194d78 100644
--- a/content/renderer/renderer_blink_platform_impl.h
+++ b/content/renderer/renderer_blink_platform_impl.h
@@ -27,10 +27,12 @@ class SyncMessageFilter;
 
 namespace blink {
 class WebBatteryStatus;
+class WebCanvasCaptureHandler;
 class WebDeviceMotionData;
 class WebDeviceOrientationData;
 class WebGraphicsContext3DProvider;
 class WebMediaRecorderHandler;
+class WebMediaStream;
 class WebServiceWorkerCacheStorage;
 }
 
@@ -141,6 +143,9 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
   blink::WebMediaRecorderHandler* createMediaRecorderHandler() override;
   blink::WebMediaStreamCenter* createMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client) override;
+  blink::WebCanvasCaptureHandler* createCanvasCaptureHandler(
+      const blink::WebSize& size,
+      blink::WebMediaStream* stream) override;
   bool processMemorySizesInBytes(size_t* private_bytes,
                                  size_t* shared_bytes) override;
   blink::WebGraphicsContext3D* createOffscreenGraphicsContext3D(