make chrome build without any printing support

headless/lib/browser/headless_devtools_manager_delegate.cc

Index: headless/lib/browser/headless_devtools_manager_delegate.cc
diff --git a/headless/lib/browser/headless_devtools_manager_delegate.cc b/headless/lib/browser/headless_devtools_manager_delegate.cc
index 291a7850383b18de42415402db3a4af7e0317659..fbe2255116d70e603f22772ddad58d8a246e1304 100644
--- a/headless/lib/browser/headless_devtools_manager_delegate.cc
+++ b/headless/lib/browser/headless_devtools_manager_delegate.cc
@@ -28,11 +28,6 @@ const char kErrorParam[] = "error";
 const char kErrorCodeParam[] = "code";
 const char kErrorMessageParam[] = "message";
 
-// The max and min value should match the ones in scaling_settings.html.
-// Update both files at the same time.
-const double kScaleMaxVal = 200;
-const double kScaleMinVal = 10;
-
 // JSON RPC 2.0 spec: http://www.jsonrpc.org/specification#error_object
 enum Error {
   kErrorInvalidParam = -32602,
@@ -96,6 +91,11 @@ void PDFCreated(
 }  // namespace
 
 #if BUILDFLAG(ENABLE_BASIC_PRINTING)
+// The max and min value should match the ones in scaling_settings.html.

[Lei Zhang, 2017/05/17 07:01:24]

Can you create another anonymous namespace for these?

[jzfeng, 2017/05/19 01:33:53]

Done.

+// Update both files at the same time.
+const double kScaleMaxVal = 200;
+const double kScaleMinVal = 10;
+
 std::unique_ptr<base::DictionaryValue> ParsePrintSettings(
     int command_id,
     const base::DictionaryValue* params,