Fix "unreachable code" warnings (MSVC warning 4702) in content/.

content/common/page_state_serialization_unittest.cc

Index: content/common/page_state_serialization_unittest.cc
===================================================================
--- content/common/page_state_serialization_unittest.cc	(revision 256983)
+++ content/common/page_state_serialization_unittest.cc	(working copy)
@@ -358,11 +358,9 @@
 }
 
 TEST_F(PageStateSerializationTest, DumpExpectedPageStateForBackwardsCompat) {
-  // Comment out this return statement to enable this code.  Use this code to
-  // generate data, based on the current serialization format, for the
-  // BackwardsCompat_vXX tests.
-  return;
-
+  // Change to #if 1 to enable this code.  Use this code to generate data, based
+  // on the current serialization format, for the BackwardsCompat_vXX tests.
+#if 0
   ExplodedPageState state;
   PopulatePageStateForBackwardsCompatTest(&state);
 
@@ -388,6 +386,7 @@
   }
 
   fclose(fp);
+#endif
 }
 
 #if !defined(OS_ANDROID)