Adding a method to delete a WebCache

This is needed so the cache doesn't survive when closing
all private tabs.

Change-Id: I52ffaf89f8794466f98370c289b9a646de0fdb59

3 files changed, 13 insertions, 2 deletions

diff --git a/WebKit/android/WebCoreSupport/WebCache.cpp b/WebKit/android/WebCoreSupport/WebCache.cpp
index 602395d..c7a6a1d 100644
--- a/WebKit/android/WebCoreSupport/WebCache.cpp
+++ b/WebKit/android/WebCoreSupport/WebCache.cpp
@@ -80,6 +80,13 @@ WebCache* WebCache::get(bool isPrivateBrowsing)
     return instancePtr->get();
 }
 
+void WebCache::cleanup(bool isPrivateBrowsing)
+{
+    MutexLocker lock(instanceMutex);
+    scoped_refptr<WebCache>* instancePtr = instance(isPrivateBrowsing);
+    *instancePtr = 0;
+}
+
 WebCache::~WebCache()
 {
     // We currently leak the HostResolver object to avoid a crash.
diff --git a/WebKit/android/WebCoreSupport/WebCache.h b/WebKit/android/WebCoreSupport/WebCache.h
index a231eb8..50ad03c 100644
--- a/WebKit/android/WebCoreSupport/WebCache.h
+++ b/WebKit/android/WebCoreSupport/WebCache.h
@@ -41,6 +41,7 @@ public:
 
     ~WebCache();
     void clear();
+    static void cleanup(bool isPrivateBrowsing);
     net::HostResolver* hostResolver() { return m_hostResolver.get(); }
     net::HttpCache* cache() { return m_cache.get(); }
     net::ProxyConfigServiceAndroid* proxy() { return m_proxyConfigService; }
diff --git a/WebKit/android/WebCoreSupport/WebRequestContext.cpp b/WebKit/android/WebCoreSupport/WebRequestContext.cpp
index 99e44ec..e108e2a 100644
--- a/WebKit/android/WebCoreSupport/WebRequestContext.cpp
+++ b/WebKit/android/WebCoreSupport/WebRequestContext.cpp
@@ -52,6 +52,7 @@ WebRequestContext::WebRequestContext(bool isPrivateBrowsing)
     if (m_isPrivateBrowsing) {
         // Delete the old files if this is the first private browsing instance
         // They are probably leftovers from a power cycle
+        // We do not need to clear the cache as it is in memory only for private browsing
         if (!numPrivateBrowsingInstances)
             WebCookieJar::cleanup(true);
         numPrivateBrowsingInstances++;
@@ -74,9 +75,11 @@ WebRequestContext::~WebRequestContext()
     if (m_isPrivateBrowsing) {
         numPrivateBrowsingInstances--;
 
-        // This is the last private browsing context, delete the cookies
-        if (!numPrivateBrowsingInstances)
+        // This is the last private browsing context, delete the cookies and cache
+        if (!numPrivateBrowsingInstances) {
             WebCookieJar::cleanup(true);
+            WebCache::cleanup(true);
+        }
     }
 }