Reland "Reland "Export symbols needed by the Chromium component build (part 1).""

This reverts commit b49520bfc08f5c5832dda1d642125f0bb898f974.

Reason for revert: Problem fixed in https://chromium-review.googlesource.com/c/chromium/src/+/1261398.

Original change's description:
> Revert "Reland "Export symbols needed by the Chromium component build (part 1).""
> 
> This reverts commit 588f4642d1a29f7beaf28265dbd08728191b4c52.
> 
> Reason for revert: Breaks WebRTC Chromium FYI Win Builder (dbg).
> lld-link: error: undefined symbol: "__declspec(dllimport) __thiscall webrtc::Config::Config(void)" (__imp_??0Config@webrtc@@QAE@XZ)
> [...]
> 
> Original change's description:
> > Reland "Export symbols needed by the Chromium component build (part 1)."
> > 
> > This reverts commit 2ea9af227517556136fd629dd2663c0d75d77c7b.
> > 
> > Reason for revert: The problem will be fixed by
> > https://chromium-review.googlesource.com/c/chromium/src/+/1261122.
> > 
> > Original change's description:
> > > Revert "Export symbols needed by the Chromium component build (part 1)."
> > > 
> > > This reverts commit 9e24dcff167c4eb3555bf0ce6eaba090c10fbe53.
> > > 
> > > Reason for revert: Breaks chromium.webrtc.fyi bots.
> > > 
> > > Original change's description:
> > > > Export symbols needed by the Chromium component build (part 1).
> > > > 
> > > > This CL uses RTC_EXPORT (defined in rtc_base/system/rtc_export.h)
> > > > to mark WebRTC symbols as visible from a shared library, this doesn't
> > > > mean these symbols are part of the public API (please continue to refer
> > > > to [1] for info about what is considered public WebRTC API).
> > > > 
> > > > [1] - https://webrtc.googlesource.com/src/+/HEAD/native-api.md
> > > > 
> > > > Bug: webrtc:9419
> > > > Change-Id: I802abd32874d42d3aa5ecd3c8022e7cf5e043d99
> > > > Reviewed-on: https://webrtc-review.googlesource.com/c/103505
> > > > Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> > > > Reviewed-by: Niels Moller <nisse@webrtc.org>
> > > > Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
> > > > Cr-Commit-Position: refs/heads/master@{#24969}
> > > 
> > > TBR=mbonadei@webrtc.org,kwiberg@webrtc.org,nisse@webrtc.org
> > > 
> > > Change-Id: I01f6e18f0d2c0f0309cdaa6c943c3927e1f1f49f
> > > No-Presubmit: true
> > > No-Tree-Checks: true
> > > No-Try: true
> > > Bug: webrtc:9419
> > > Reviewed-on: https://webrtc-review.googlesource.com/c/103720
> > > Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> > > Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> > > Cr-Commit-Position: refs/heads/master@{#24974}
> > 
> > TBR=mbonadei@webrtc.org,kwiberg@webrtc.org,nisse@webrtc.org
> > 
> > Change-Id: I83bbc7f550fc23e823c4d055e0a6f60c828960dd
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: webrtc:9419
> > Reviewed-on: https://webrtc-review.googlesource.com/c/103740
> > Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> > Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> > Cr-Commit-Position: refs/heads/master@{#24980}
> 
> TBR=mbonadei@webrtc.org,kwiberg@webrtc.org,nisse@webrtc.org
> 
> Change-Id: I4b7cfe492f2c8eeda5c8ac52520e0cfc95ade9b0
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: webrtc:9419
> Reviewed-on: https://webrtc-review.googlesource.com/c/103801
> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#24983}

TBR=mbonadei@webrtc.org,kwiberg@webrtc.org,nisse@webrtc.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: webrtc:9419
Change-Id: Id986a0a03cdc2818690337784396882af067f7fa
Reviewed-on: https://webrtc-review.googlesource.com/c/104602
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25049}
diff --git a/modules/audio_processing/include/audio_processing.h b/modules/audio_processing/include/audio_processing.h
index 26880e3..8af0cb2 100644
--- a/modules/audio_processing/include/audio_processing.h
+++ b/modules/audio_processing/include/audio_processing.h
@@ -34,6 +34,7 @@
 #include "rtc_base/platform_file.h"
 #include "rtc_base/refcount.h"
 #include "rtc_base/scoped_ref_ptr.h"
+#include "rtc_base/system/rtc_export.h"
 
 namespace webrtc {
 
@@ -551,7 +552,7 @@
     float minimum_ = 0.0f;  // Long-term minimum.
   };
 
-  struct AudioProcessingStatistics {
+  struct RTC_EXPORT AudioProcessingStatistics {
     AudioProcessingStatistics();
     AudioProcessingStatistics(const AudioProcessingStatistics& other);
     ~AudioProcessingStatistics();
@@ -648,7 +649,7 @@
   static const int kChunkSizeMs = 10;
 };
 
-class AudioProcessingBuilder {
+class RTC_EXPORT AudioProcessingBuilder {
  public:
   AudioProcessingBuilder();
   ~AudioProcessingBuilder();