Disable legacy hooking in the browser process

Now that TSF is enabled by default in m75, there are no
known blocking issue anymore.

Bug: 557798
Change-Id: Iaf060e267982d3f90acc5281caf99ff02e155dbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1597282Reviewed-by: Will Harris <wfh@chromium.org>
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657798}

chrome_elf/chrome_elf_main.cc

@@ -12,6 +12,7 @@
 #include "chrome/install_static/product_install_details.h"
 #include "chrome/install_static/user_data_dir.h"
 #include "chrome_elf/blacklist/blacklist.h"
+#include "chrome_elf/chrome_elf_security.h"
 #include "chrome_elf/crash/crash_helper.h"
 #include "chrome_elf/third_party_dlls/main.h"
 
@@ -70,6 +71,9 @@ BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) {
     if (install_static::IsNonBrowserProcess())
       return TRUE;
 
+    // Disable legacy hooking.
+    elf_security::EarlyBrowserSecurity();
+
     __try {
       // Initialize blacklist before initializing third_party_dlls.
       // Note: "blacklist" is deprecated in favor of "third_party_dlls", but