Change clang-format's Chromium JavaScript defaults

Chromium is starting to use clang-format on more JavaScript.

In doing this, we discovered that our defaults were not doing a good job
differentiating between JS and C++.

This change moves some defaults to only apply to C++.
https://reviews.llvm.org/D28165

Patch from Dan Beam <dbeam@chromium.org>!

llvm-svn: 290930
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 70b90d6..389761d 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -638,6 +638,9 @@
     ChromiumStyle.BreakAfterJavaFieldAnnotations = true;
     ChromiumStyle.ContinuationIndentWidth = 8;
     ChromiumStyle.IndentWidth = 4;
+  } else if (Language == FormatStyle::LK_JavaScript) {
+    ChromiumStyle.AllowShortIfStatementsOnASingleLine = false;
+    ChromiumStyle.AllowShortLoopsOnASingleLine = false;
   } else {
     ChromiumStyle.AllowAllParametersOfDeclarationOnNextLine = false;
     ChromiumStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;