chromium-dev: Update

pkgs/applications/networking/browsers/chromium/source/sources.nix

···
 # This file is autogenerated from update.sh in the parent directory.
 {
   dev = {
-    version = "45.0.2454.6";
-    sha256 = "09bhbq3hvsfiac7w6ajd6n1lcdzf2isg1s9sqabrnx9blyds7msh";
-    sha256bin32 = "1f38rfd9v91inhd9m2sfcj4bpvq5f03zn8ypvacr9mpwc47rylx3";
-    sha256bin64 = "1bfjpjisa0hqiy8kmmgh2mr6zyifpmhr7k5ai44h5szf36768bn6";
+    version = "45.0.2454.7";
+    sha256 = "19xjdp0zxr96r2fx9wf30wldalrh393p2dhqwp2n1m751vizbj5s";
+    sha256bin32 = "1id1z3m0pc2lxh4lp9r6babh098gfyz4dda931yjkxhzb9rw1v0d";
+    sha256bin64 = "1sksf651z1sqgh9pwdm5dksqnb0lzhwabxj3myg4w5kxi8s4pi8l";
   };
   beta = {
     version = "44.0.2403.89";