Use AVDA copying strategy unless the unified pipeline flag is set.

content/common/gpu/media/android_copying_backing_strategy.h

Index: content/common/gpu/media/android_copying_backing_strategy.h
diff --git a/content/common/gpu/media/android_copying_backing_strategy.h b/content/common/gpu/media/android_copying_backing_strategy.h
index 15be76d8be7324a393e9219d00fc3aa02b330f5e..92f82ffe1a1d64f69d32609f64043566e2ba73bc 100644
--- a/content/common/gpu/media/android_copying_backing_strategy.h
+++ b/content/common/gpu/media/android_copying_backing_strategy.h
@@ -40,11 +40,6 @@ class CONTENT_EXPORT AndroidCopyingBackingStrategy
       media::VideoCodecBridge*,
       const AndroidVideoDecodeAccelerator::OutputBufferMap&) override;
 
-  static media::VideoDecodeAccelerator::Capabilities::Flags
-  GetCapabilitiesFlags() {
-    return media::VideoDecodeAccelerator::Capabilities::NO_FLAGS;
-  }
-
  private:
   // Used for copy the texture from surface texture to picture buffers.
   scoped_ptr<gpu::CopyTextureCHROMIUMResourceManager> copier_;