Cleanup: Remove unneeded forward declarations from various chrome subdirectories.

chrome/service/cloud_print/cloud_print_helpers.h

Index: chrome/service/cloud_print/cloud_print_helpers.h
===================================================================
--- chrome/service/cloud_print/cloud_print_helpers.h	(revision 109585)
+++ chrome/service/cloud_print/cloud_print_helpers.h	(working copy)
@@ -8,13 +8,11 @@
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "chrome/service/cloud_print/print_system.h"
 #include "googleurl/src/gurl.h"
 
-class Task;
-class URLFetcher;
-
 namespace base {
 class DictionaryValue;
 }
@@ -72,9 +70,9 @@
   static bool IsDryRunJob(const std::vector<std::string>& tags);
 
   static std::string GetCloudPrintAuthHeader();
+
  private:
-  CloudPrintHelpers() {
-  }
+  CloudPrintHelpers() {}
 };
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_