fix: backport b52f7fb5933a from WebRTC. (#23044)

[DirectX] Fix vector allocation for raw data handling.

std::vector::reserve has the effect to reserve space in memory but does
not affect the result of size(), which keeps on returning 0. If size is
0, however, data() might either return null or not [1].

This CL fixes the use of reserve() in favour of resize() which
effectively allocates the memory in the vector and updates its size.
This way size() returns a value bigger than 0 and data() returns a valid
pointer.

[1] https://en.cppreference.com/w/cpp/container/vector/data

Fixed: chromium:1059764
Change-Id: Ida3dbe643710c6895f09b9da87b0075b7d7b28df
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/170470
Reviewed-by: Jamie Walch <[email protected]>
Commit-Queue: Armando Miraglia <[email protected]>
Cr-Commit-Position: refs/heads/master@{#30836}

patches/config.json

@@ -13,5 +13,7 @@
 
   "src/electron/patches/v8":  "src/v8",
 
-  "src/electron/patches/node": "src/third_party/electron_node"
+  "src/electron/patches/node": "src/third_party/electron_node",
+
+  "src/electron/patches/webrtc": "src/third_party/webrtc"
 }

patches/webrtc/.patches

@@ -0,0 +1 @@
+fix_vector_allocation_for_raw_data_handling.patch

patches/webrtc/fix_vector_allocation_for_raw_data_handling.patch

@@ -0,0 +1,36 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Armando Miraglia <[email protected]>
+Date: Mon, 16 Mar 2020 13:10:26 +0100
+Subject: Fix vector allocation for raw data handling.
+
+std::vector::reserve has the effect to reserve space in memory but does
+not affect the result of size(), which keeps on returning 0. If size is
+0, however, data() might either return null or not [1].
+
+This CL fixes the use of reserve() in favour of resize() which
+effectively allocates the memory in the vector and updates its size.
+This way size() returns a value bigger than 0 and data() returns a valid
+pointer.
+
+[1] https://en.cppreference.com/w/cpp/container/vector/data
+
+Fixed: chromium:1059764
+Change-Id: Ida3dbe643710c6895f09b9da87b0075b7d7b28df
+Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/170470
+Reviewed-by: Jamie Walch <[email protected]>
+Commit-Queue: Armando Miraglia <[email protected]>
+Cr-Commit-Position: refs/heads/master@{#30836}
+
+diff --git a/modules/desktop_capture/win/dxgi_output_duplicator.cc b/modules/desktop_capture/win/dxgi_output_duplicator.cc
+index db7ba251c230a2bf4481ee70a1533984a9f7159b..2d56b9af36ef49b3f149141af3dd89fb8821c001 100644
+--- a/modules/desktop_capture/win/dxgi_output_duplicator.cc
++++ b/modules/desktop_capture/win/dxgi_output_duplicator.cc
+@@ -275,7 +275,7 @@ bool DxgiOutputDuplicator::DoDetectUpdatedRegion(
+ 
+   if (metadata_.capacity() < frame_info.TotalMetadataBufferSize) {
+     metadata_.clear();  // Avoid data copy
+-    metadata_.reserve(frame_info.TotalMetadataBufferSize);
++    metadata_.resize(frame_info.TotalMetadataBufferSize);
+   }
+ 
+   UINT buff_size = 0;