Roll chromium_revision ddfc1fe..e78bc2f (365801:365856)

Change log: https://chromium.googlesource.com/chromium/src/+log/ddfc1fe..e78bc2f
Full diff: https://chromium.googlesource.com/chromium/src/+/ddfc1fe..e78bc2f

No dependencies changed.
No update to Clang.

TBR=

Review URL: https://codereview.webrtc.org/1534863002

Cr-Commit-Position: refs/heads/master@{#11073}
diff --git a/DEPS b/DEPS
index fc84f62..3b071cf 100644
--- a/DEPS
+++ b/DEPS
@@ -6,7 +6,7 @@
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': 'ddfc1fe7e2643072e6b2745b80be38b4dd02a015',
+  'chromium_revision': 'e78bc2f616abc6be6f9b915bb74b1b7a96d312e2',
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than