Replace VideoEncoderFactory::QueryVideoEncoder with VideoEncoder::GetEncoderInfo

Make implementation of VideoEncoderFactory::QueryVideoEncoder optional
until it is removed downstream and remove all implementations of it.

Bug: webrtc:10065
Change-Id: Ibb1f9612234e536651ce53f05ee048a5d172a41f
Reviewed-on: https://webrtc-review.googlesource.com/c/113065
Commit-Queue: Mirta Dvornicic <mirtad@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25924}
diff --git a/api/test/mock_video_encoder_factory.h b/api/test/mock_video_encoder_factory.h
index a694b63..845251b 100644
--- a/api/test/mock_video_encoder_factory.h
+++ b/api/test/mock_video_encoder_factory.h
@@ -24,8 +24,6 @@
  public:
   MOCK_CONST_METHOD0(GetSupportedFormats,
                      std::vector<webrtc::SdpVideoFormat>());
-  MOCK_CONST_METHOD1(QueryVideoEncoder,
-                     CodecInfo(const webrtc::SdpVideoFormat&));
 
   // We need to proxy to a return type that is copyable.
   std::unique_ptr<webrtc::VideoEncoder> CreateVideoEncoder(
diff --git a/api/test/video/function_video_encoder_factory.h b/api/test/video/function_video_encoder_factory.h
index 85f848c..514bd48 100644
--- a/api/test/video/function_video_encoder_factory.h
+++ b/api/test/video/function_video_encoder_factory.h
@@ -41,14 +41,6 @@
     return {};
   }
 
-  CodecInfo QueryVideoEncoder(
-      const SdpVideoFormat& /* format */) const override {
-    CodecInfo codec_info;
-    codec_info.is_hardware_accelerated = false;
-    codec_info.has_internal_source = false;
-    return codec_info;
-  }
-
   std::unique_ptr<VideoEncoder> CreateVideoEncoder(
       const SdpVideoFormat& format) override {
     return create_(format);
diff --git a/api/video_codecs/BUILD.gn b/api/video_codecs/BUILD.gn
index 534a34e..0fd0b99 100644
--- a/api/video_codecs/BUILD.gn
+++ b/api/video_codecs/BUILD.gn
@@ -27,6 +27,7 @@
     "video_encoder.h",
     "video_encoder_config.cc",
     "video_encoder_config.h",
+    "video_encoder_factory.cc",
     "video_encoder_factory.h",
     "vp8_temporal_layers.h",
   ]
diff --git a/api/video_codecs/builtin_video_encoder_factory.cc b/api/video_codecs/builtin_video_encoder_factory.cc
index 1778c21..e687871 100644
--- a/api/video_codecs/builtin_video_encoder_factory.cc
+++ b/api/video_codecs/builtin_video_encoder_factory.cc
@@ -44,17 +44,6 @@
   BuiltinVideoEncoderFactory()
       : internal_encoder_factory_(new InternalEncoderFactory()) {}
 
-  VideoEncoderFactory::CodecInfo QueryVideoEncoder(
-      const SdpVideoFormat& format) const override {
-    // Format must be one of the internal formats.
-    RTC_DCHECK(IsFormatSupported(
-        internal_encoder_factory_->GetSupportedFormats(), format));
-    VideoEncoderFactory::CodecInfo info;
-    info.has_internal_source = false;
-    info.is_hardware_accelerated = false;
-    return info;
-  }
-
   std::unique_ptr<VideoEncoder> CreateVideoEncoder(
       const SdpVideoFormat& format) override {
     // Try creating internal encoder.
diff --git a/api/video_codecs/video_encoder_factory.cc b/api/video_codecs/video_encoder_factory.cc
new file mode 100644
index 0000000..de71aa6
--- /dev/null
+++ b/api/video_codecs/video_encoder_factory.cc
@@ -0,0 +1,26 @@
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "api/video_codecs/video_encoder_factory.h"
+
+// TODO(webrtc:10065) Remove once downstream projects have been updated.
+namespace webrtc {
+
+VideoEncoderFactory::CodecInfo::CodecInfo()
+    : is_hardware_accelerated(false), has_internal_source(false) {}
+
+VideoEncoderFactory::CodecInfo::~CodecInfo() = default;
+
+VideoEncoderFactory::CodecInfo VideoEncoderFactory::QueryVideoEncoder(
+    const SdpVideoFormat& format) const {
+  return CodecInfo();
+}
+
+}  // namespace webrtc
diff --git a/api/video_codecs/video_encoder_factory.h b/api/video_codecs/video_encoder_factory.h
index 7958d16..7b2b156 100644
--- a/api/video_codecs/video_encoder_factory.h
+++ b/api/video_codecs/video_encoder_factory.h
@@ -25,6 +25,9 @@
  public:
   // TODO(magjed): Try to get rid of this struct.
   struct CodecInfo {
+    CodecInfo();
+    ~CodecInfo();
+
     // |is_hardware_accelerated| is true if the encoders created by this factory
     // of the given codec will use hardware support.
     bool is_hardware_accelerated;
@@ -43,7 +46,7 @@
   // Returns information about how this format will be encoded. The specified
   // format must be one of the supported formats by this factory.
   // TODO(magjed): Try to get rid of this method.
-  virtual CodecInfo QueryVideoEncoder(const SdpVideoFormat& format) const = 0;
+  virtual CodecInfo QueryVideoEncoder(const SdpVideoFormat& format) const;
 
   // Creates a VideoEncoder for the specified format.
   virtual std::unique_ptr<VideoEncoder> CreateVideoEncoder(