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

content/common/indexed_db/indexed_db_param_traits.cc

Index: content/common/indexed_db/indexed_db_param_traits.cc
===================================================================
--- content/common/indexed_db/indexed_db_param_traits.cc	(revision 256983)
+++ content/common/indexed_db/indexed_db_param_traits.cc	(working copy)
@@ -36,21 +36,28 @@
     case WebIDBKeyTypeArray:
       WriteParam(m, p.array());
       return;
+
     case WebIDBKeyTypeBinary:
       WriteParam(m, p.binary());
       return;
+
     case WebIDBKeyTypeString:
       WriteParam(m, p.string());
       return;
+
+
     case WebIDBKeyTypeDate:
       WriteParam(m, p.date());
       return;
+
     case WebIDBKeyTypeNumber:
       WriteParam(m, p.number());
       return;
+
     case WebIDBKeyTypeInvalid:
     case WebIDBKeyTypeNull:
       return;
+
     case WebIDBKeyTypeMin:
     default:
       NOTREACHED();
@@ -65,7 +72,6 @@
   if (!ReadParam(m, iter, &type))
     return false;
   WebIDBKeyType web_type = static_cast<WebIDBKeyType>(type);
-
   switch (web_type) {
     case WebIDBKeyTypeArray: {
       std::vector<IndexedDBKey> array;
@@ -74,6 +80,7 @@
       *r = IndexedDBKey(array);
       return true;
     }
+
     case WebIDBKeyTypeBinary: {
       std::string binary;
       if (!ReadParam(m, iter, &binary))
@@ -81,6 +88,7 @@
       *r = IndexedDBKey(binary);
       return true;
     }
+
     case WebIDBKeyTypeString: {
       base::string16 string;
       if (!ReadParam(m, iter, &string))
@@ -88,6 +96,7 @@
       *r = IndexedDBKey(string);
       return true;
     }
+
     case WebIDBKeyTypeDate:
     case WebIDBKeyTypeNumber: {
       double number;
@@ -96,17 +105,17 @@
       *r = IndexedDBKey(number, web_type);
       return true;
     }
+
     case WebIDBKeyTypeInvalid:
     case WebIDBKeyTypeNull:
       *r = IndexedDBKey(web_type);
       return true;
+
     case WebIDBKeyTypeMin:
     default:
       NOTREACHED();
       return false;
   }
-  NOTREACHED();
-  return false;
 }
 
 void ParamTraits<IndexedDBKey>::Log(const param_type& p, std::string* l) {
@@ -138,13 +147,18 @@
     case WebIDBKeyPathTypeArray:
       WriteParam(m, p.array());
       return;
+
     case WebIDBKeyPathTypeString:
       WriteParam(m, p.string());
       return;
+
     case WebIDBKeyPathTypeNull:
       return;
+
+    default:
+      NOTREACHED();
+      return;
   }
-  NOTREACHED();
 }
 
 bool ParamTraits<IndexedDBKeyPath>::Read(const Message* m,
@@ -153,7 +167,6 @@
   int type;
   if (!ReadParam(m, iter, &type))
     return false;
-
   switch (type) {
     case WebIDBKeyPathTypeArray: {
       std::vector<base::string16> array;
@@ -162,6 +175,7 @@
       *r = IndexedDBKeyPath(array);
       return true;
     }
+
     case WebIDBKeyPathTypeString: {
       base::string16 string;
       if (!ReadParam(m, iter, &string))
@@ -169,12 +183,15 @@
       *r = IndexedDBKeyPath(string);
       return true;
     }
+
     case WebIDBKeyPathTypeNull:
       *r = IndexedDBKeyPath();
       return true;
+
+    default:
+      NOTREACHED();
+      return false;
   }
-  NOTREACHED();
-  return false;
 }
 
 void ParamTraits<IndexedDBKeyPath>::Log(const param_type& p, std::string* l) {