Don't use gtk2 instrumented library when using gtk3

third_party/instrumented_libraries/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/linux/gtk/gtk.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/goma.gni")
 
 declare_args() {
   # The default number of jobs to use when building instrumented libraries.
   instrumented_libraries_jobs = 8
 
   # The platform on which the instrumented libraries are being built.
   instrumented_libraries_platform = "trusty"
 }
@@ skipping 100 matching lines @@
       ":libcredentialkit_pkcs11",
       ":libdbus-1-3",
       ":libdbus-glib-1-2",
       ":libdbusmenu",
       ":libdbusmenu-glib4",
       ":libexpat1",
       ":libffi6",
       ":libfontconfig1",
       ":libgconf-2-4",
       ":libgcrypt11",
-      ":libgdk-pixbuf2.0-0",
       ":libglib2.0-0",
       ":libgnome-keyring0",
       ":libgpg-error0",
-      ":libgtk2.0-0",
       ":libnspr4",
       ":libp11-kit0",
       ":libpci3",
       ":libpcre3",
       ":libpixman-1-0",
       ":libunity9",
       ":libva1",
       ":libx11-6",
       ":libxau6",
       ":libxcb1",
       ":libxcomposite1",
       ":libxcursor1",
       ":libxdamage1",
       ":libxdmcp6",
       ":libxext6",
       ":libxfixes3",
       ":libxi6",
       ":libxinerama1",
       ":libxrandr2",
       ":libxrender1",
       ":libxss1",
       ":libxtst6",
       ":nss",
       ":pango1.0",
       ":pulseaudio",
       ":udev",
       ":zlib1g",
     ]
+    if (!use_gtk3) {
+      deps += [
+        ":libgdk-pixbuf2.0-0",
+        ":libgtk2.0-0",
+      ]
+    }
     if (is_precise) {
       deps += [ ":libtasn1-3" ]
     }
     if (is_trusty) {
       deps += [
         ":harfbuzz",
         ":libsecret",
         ":libtasn1-6",
       ]
     }
@@ skipping 643 matching lines @@
       "--disable-gudev",
     ]
     pre_build = "scripts/pre-build/udev.sh"
   }
 
   instrumented_library("zlib1g") {
     # --disable-static is not supported
     patch = "patches/zlib1g.diff"
   }
 }