clang-format produced code that (choose all that apply): 
+ Doesn't match Chromium style
+ Riles my finely honed stylistic dander
+ No sane human would ever choose

Seems like Java 8 Method References are given extra spaces for no reason. 

Here's the code before formatting:

   private void foo() {
        someFunctionAcceptingALambda(this::methodReference);
   }


Here's the code after formatting:

   private void foo() {
        someFunctionAcceptingALambda(this ::methodReference);
   }

Here's how it ought to look:

- no change -

Code review link for full files/context:

https://chromium-review.googlesource.com/c/chromium/src/+/1227216/2/chrome/android/java/src/org/chromium/chrome/browser/explore_sites/ExperimentalExploreSitesSection.java