Run gn format on all BUILD.gn files (gn version 306668)

mojo/public/java/BUILD.gn

Index: mojo/public/java/BUILD.gn
diff --git a/mojo/public/java/BUILD.gn b/mojo/public/java/BUILD.gn
index 6f5d8e915f0345e5542c23c18c34f77aedf9fb8d..04d2ef660801395b5c44ff48de0eec4cbde2cf78 100644
--- a/mojo/public/java/BUILD.gn
+++ b/mojo/public/java/BUILD.gn
@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
- 
+
 android_library("system") {
   java_files = [
     "system/src/org/chromium/mojo/system/AsyncWaiter.java",
@@ -49,5 +49,7 @@ android_library("bindings") {
     "bindings/src/org/chromium/mojo/bindings/Struct.java",
   ]
 
-  deps = [ ":system" ]
+  deps = [
+    ":system",
+  ]
 }