diff -r 000000000000 -r 4f2f89ce4247 WebKit/chromium/src/WebCache.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit/chromium/src/WebCache.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebCache.h"
+
+// Instead of providing accessors, we make all members of Cache public.
+// This will make it easier to track WebCore changes to the Cache class.
+// FIXME: We should introduce public getters on the Cache class.
+#define private public
+#include "Cache.h"
+#undef private
+
+using namespace WebCore;
+
+namespace WebKit {
+
+// A helper method for coverting a Cache::TypeStatistic to a
+// WebCache::ResourceTypeStat.
+static void ToResourceTypeStat(const Cache::TypeStatistic& from,
+                               WebCache::ResourceTypeStat& to)
+{
+    to.count = static_cast<size_t>(from.count);
+    to.size = static_cast<size_t>(from.size);
+    to.liveSize = static_cast<size_t>(from.liveSize);
+    to.decodedSize = static_cast<size_t>(from.decodedSize);
+}
+
+void WebCache::setCapacities(
+    size_t minDeadCapacity, size_t maxDeadCapacity, size_t capacity)
+{
+    Cache* cache = WebCore::cache();
+    if (cache)
+        cache->setCapacities(static_cast<unsigned int>(minDeadCapacity),
+                             static_cast<unsigned int>(maxDeadCapacity),
+                             static_cast<unsigned int>(capacity));
+}
+
+void WebCache::clear()
+{
+    Cache* cache = WebCore::cache();
+    if (cache && !cache->disabled()) {
+        // NOTE: I think using setDisabled() instead of setCapacities() will
+        // remove from the cache items that won't actually be freed from memory
+        // (due to other live references to them), so it just results in wasting
+        // time later and not saving memory compared to the below technique.
+        unsigned minDeadCapacity = cache->m_minDeadCapacity;
+        unsigned maxDeadCapacity = cache->m_maxDeadCapacity;
+        unsigned capacity = cache->m_capacity;
+        cache->setCapacities(0, 0, 0);  // Will prune the cache.
+        cache->setCapacities(minDeadCapacity, maxDeadCapacity, capacity);
+    }
+}
+
+void WebCache::getUsageStats(UsageStats* result)
+{
+    ASSERT(result);
+
+    Cache* cache = WebCore::cache();
+    if (cache) {
+        result->minDeadCapacity = cache->m_minDeadCapacity;
+        result->maxDeadCapacity = cache->m_maxDeadCapacity;
+        result->capacity = cache->m_capacity;
+        result->liveSize = cache->m_liveSize;
+        result->deadSize = cache->m_deadSize;
+    } else
+        memset(result, 0, sizeof(UsageStats));
+}
+
+void WebCache::getResourceTypeStats(ResourceTypeStats* result)
+{
+    Cache* cache = WebCore::cache();
+    if (cache) {
+        Cache::Statistics stats = cache->getStatistics();
+        ToResourceTypeStat(stats.images, result->images);
+        ToResourceTypeStat(stats.cssStyleSheets, result->cssStyleSheets);
+        ToResourceTypeStat(stats.scripts, result->scripts);
+#if ENABLE(XSLT)
+        ToResourceTypeStat(stats.xslStyleSheets, result->xslStyleSheets);
+#else
+        memset(&result->xslStyleSheets, 0, sizeof(result->xslStyleSheets));
+#endif
+        ToResourceTypeStat(stats.fonts, result->fonts);
+    } else
+        memset(result, 0, sizeof(WebCache::ResourceTypeStats));
+}
+
+}  // namespace WebKit