tools/cfi: Ignore cfi-icall for dawn_native.

Dawn calls function pointers from the OpenGL and Vulkan shared
libraries.

TBR=pcc@chromium.org

Bug: chromium:1139232
Change-Id: I1bdef2009f2788b3b8543e6fc75584d4c07c89db
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2478987
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817856}
GitOrigin-RevId: fb3bb44091bc725ba55d55760bcbeea2ce93caaf
diff --git a/ignores.txt b/ignores.txt
index 4a6f5f8..7a498aa 100644
--- a/ignores.txt
+++ b/ignores.txt
@@ -139,6 +139,9 @@
 fun:*GetTraceCategoryEnabledFlag*
 fun:*AddTraceEvent*
 
+# Dawn, calls to OpenGL and Vulkan function pointers from shared library.
+src:*third_part/dawn/src/dawn_native/*
+
 # PPAPI
 src:*ppapi/*
 src:*content/renderer/pepper*