Revert "Migrate the IndexedDB backend from Blink to Chromium"

content/common/indexed_db/indexed_db_key.cc

Index: content/common/indexed_db/indexed_db_key.cc
diff --git a/content/common/indexed_db/indexed_db_key.cc b/content/common/indexed_db/indexed_db_key.cc
index 5019c1cdb0e572cb56ce95d8074452034131cf6f..76306fd834cd47df5028c3cfc13a27ef5057f3f1 100644
--- a/content/common/indexed_db/indexed_db_key.cc
+++ b/content/common/indexed_db/indexed_db_key.cc
@@ -4,7 +4,6 @@
 
 #include "content/common/indexed_db/indexed_db_key.h"
 
-#include <string>
 #include "base/logging.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebVector.h"
@@ -61,7 +60,7 @@ static IndexedDBKey::KeyArray CopyKeyArray(const WebIDBKey& other) {
   }
   return result;
 }
-}  // namespace
+} // namespace
 
 IndexedDBKey::IndexedDBKey()
     : type_(WebIDBKey::NullType),
@@ -105,8 +104,6 @@ IndexedDBKey::IndexedDBKey(const string16& key)
 IndexedDBKey::~IndexedDBKey() {}
 
 int IndexedDBKey::Compare(const IndexedDBKey& other) const {
-  DCHECK(IsValid());
-  DCHECK(other.IsValid());
   if (type_ != other.type_)
     return type_ > other.type_ ? -1 : 1;
 
@@ -124,17 +121,15 @@ int IndexedDBKey::Compare(const IndexedDBKey& other) const {
     case WebIDBKey::StringType:
       return -other.string_.compare(string_);
     case WebIDBKey::DateType:
-      return (date_ < other.date_) ? -1 : (date_ > other.date_) ? 1 : 0;
     case WebIDBKey::NumberType:
       return (number_ < other.number_) ? -1 : (number_ > other.number_) ? 1 : 0;
     case WebIDBKey::InvalidType:
     case WebIDBKey::NullType:
-    case WebIDBKey::MinType:
+    default:
+      // This is a placeholder for WebKit::WebIDBKey::MinType
       NOTREACHED();
       return 0;
   }
-  NOTREACHED();
-  return 0;
 }
 
 bool IndexedDBKey::IsLessThan(const IndexedDBKey& other) const {
@@ -145,20 +140,6 @@ bool IndexedDBKey::IsEqual(const IndexedDBKey& other) const {
   return !Compare(other);
 }
 
-bool IndexedDBKey::IsValid() const {
-  if (type_ == WebIDBKey::InvalidType || type_ == WebIDBKey::NullType)
-    return false;
-
-  if (type_ == WebIDBKey::ArrayType) {
-    for (size_t i = 0; i < array_.size(); i++) {
-      if (!array_[i].IsValid())
-        return false;
-    }
-  }
-
-  return true;
-}
-
 IndexedDBKey::operator WebIDBKey() const {
   switch (type_) {
     case WebIDBKey::ArrayType:
@@ -173,12 +154,11 @@ IndexedDBKey::operator WebIDBKey() const {
       return WebIDBKey::createInvalid();
     case WebIDBKey::NullType:
       return WebIDBKey::createNull();
-    case WebIDBKey::MinType:
+    default:
+      // This is a placeholder for WebKit::WebIDBKey::MinType
       NOTREACHED();
       return WebIDBKey::createInvalid();
   }
-  NOTREACHED();
-  return WebIDBKey::createInvalid();
 }
 
 }  // namespace content