tools/gn: Fix the includes of target_generator.h header.

tools/gn/target_generator.h

Index: tools/gn/target_generator.h
diff --git a/tools/gn/target_generator.h b/tools/gn/target_generator.h
index 1fed3038c560d7292a415b1e3bcd5f326fc34e01..83e3af1d9f0bb34c76ee81be05d1895406e14b6a 100644
--- a/tools/gn/target_generator.h
+++ b/tools/gn/target_generator.h
@@ -8,16 +8,15 @@
 #include <string>
 #include <vector>
 
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "tools/gn/source_dir.h"
-#include "tools/gn/target.h"
+#include "base/macros.h"
+#include "tools/gn/label_ptr.h"
+#include "tools/gn/unique_vector.h"
 
 class BuildSettings;
 class Err;
 class FunctionCallNode;
-class Location;
 class Scope;
+class SubstitutionPattern;
 class Value;
 
 // Fills the variables in a Target object from a Scope (the result of a script
@@ -58,9 +57,8 @@ class TargetGenerator {
   // Rrturns true if the given pattern will expand to a file in the output
   // directory. If not, returns false and sets the error, blaming the given
   // Value.
-  bool EnsureSubstitutionIsInOutputDir(
-      const SubstitutionPattern& pattern,
-      const Value& original_value);
+  bool EnsureSubstitutionIsInOutputDir(const SubstitutionPattern& pattern,
+                                       const Value& original_value);
 
   Target* target_;
   Scope* scope_;