Configure DomDistiller debug output.

components/dom_distiller/standalone/content_extractor.cc

Index: components/dom_distiller/standalone/content_extractor.cc
diff --git a/components/dom_distiller/standalone/content_extractor.cc b/components/dom_distiller/standalone/content_extractor.cc
index dd694959a9cb9bb570278b7642ee9449f16143b3..e851a711e75c95a2a25941d52c1ca78dfd84cea6 100644
--- a/components/dom_distiller/standalone/content_extractor.cc
+++ b/components/dom_distiller/standalone/content_extractor.cc
@@ -9,6 +9,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
+#include "base/strings/string_number_conversions.h"
 #include "components/dom_distiller/content/distiller_page_web_contents.h"
 #include "components/dom_distiller/core/distiller.h"
 #include "components/dom_distiller/core/dom_distiller_database.h"
@@ -44,8 +45,12 @@ const char* kOutputFile = "output-file";
 // output.
 const char* kShouldOutputBinary = "output-binary";
 
+// Indicates to output only the text of the article and not the enclosing html.
 const char* kExtractTextOnly = "extract-text-only";
 
+// Indicates to include debug output.
+const char* kDebugLevel = "debug-level";
+
 scoped_ptr<DomDistillerService> CreateDomDistillerService(
     content::BrowserContext* context,
     const base::FilePath& db_path) {
@@ -69,6 +74,14 @@ scoped_ptr<DomDistillerService> CreateDomDistillerService(
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(kExtractTextOnly)) {
     options.set_extract_text_only(true);
   }
+  int debug_level = 0;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(kDebugLevel) &&
+      base::StringToInt(
+          base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+              kDebugLevel),
+          &debug_level)) {
+    options.set_debug_level(debug_level);
+  }
   scoped_ptr<DistillerFactory> distiller_factory(
       new DistillerFactoryImpl(distiller_url_fetcher_factory.Pass(), options));