Merge pull request #1426 from brave/70.0.3538.45

Upgrade Chromium from 70.0.3538.35 to 70.0.3538.45

Author: bbondy

package.json

@@ -22,7 +22,7 @@
     "projects": {
       "chrome": {
         "dir": "src",
-        "tag": "70.0.3538.35",
+        "tag": "70.0.3538.45",
         "repository": {
           "url": "https://chromium.googlesource.com/chromium/src.git"
         },