Run clang-format on .js files in c/b/r/md_extensions

chrome/browser/resources/md_extensions/code_section.js

Index: chrome/browser/resources/md_extensions/code_section.js
diff --git a/chrome/browser/resources/md_extensions/code_section.js b/chrome/browser/resources/md_extensions/code_section.js
index 502c86dc1fffea9e53fba639fb71bef9c0751e92..d2f4e8f32eb42cb8d4f7c8c61bfdb34771503bf7 100644
--- a/chrome/browser/resources/md_extensions/code_section.js
+++ b/chrome/browser/resources/md_extensions/code_section.js
@@ -35,8 +35,8 @@ cr.define('extensions', function() {
      */
     isEmpty: function() {
       return !this.code ||
-             (!this.code.beforeHighlight && !this.code.highlight &&
-              !this.code.afterHighlight);
+          (!this.code.beforeHighlight && !this.code.highlight &&

[Devlin, 2017/06/17 02:25:39]

this now violates the rectangle rule, which I *thought* was part of our style,
but now only appears briefly (though this style violates that brief rule).

Do you know if a) style preference has changed or b) we can tweak the js format
to respect rectangle-rule style?

[Dan Beam, 2017/06/19 23:01:24]

there's an internal reference to this rectangle rule
go/js#formatting-where-to-break but i don't think this new style violates it/

can you explain to me why you think this violates the rectangle rule?  note:
it's not about visually appearing like a rectangle.

[Devlin, 2017/06/20 16:02:06]

The rule says you should be able to "draw" a rectangle around each "subtree"
(strange phrasing, but it's what it uses).  In this case, you can't draw a
rectangle around the return value (excluding the return statement).

That said, if this is only really described in the internal docs, it doesn't
really apply to chromium, so maybe this is fine?

+           !this.code.afterHighlight);
     },
 
     /**
@@ -49,9 +49,9 @@ cr.define('extensions', function() {
       if (!this.code)
         return '';
 
-      var lines = [this.code.beforeHighlight,
-                   this.code.highlight,
-                   this.code.afterHighlight].join('').match(/\n/g);
+      var lines = [
+        this.code.beforeHighlight, this.code.highlight, this.code.afterHighlight
+      ].join('').match(/\n/g);
       var lineCount = lines ? lines.length : 0;
       var textContent = '';
       for (var i = 1; i <= lineCount; ++i)