[DevTools] Create last agents on attach, modify InspectorDatabaseAgent to support it.

third_party/WebKit/Source/modules/webdatabase/DatabaseTracker.cpp

 /*
  * Copyright (C) 2011 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
@@ skipping 12 matching lines @@
  * 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 "modules/webdatabase/DatabaseTracker.h"
 
+#include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/ExecutionContextTask.h"
 #include "modules/webdatabase/Database.h"
 #include "modules/webdatabase/DatabaseClient.h"
 #include "modules/webdatabase/DatabaseContext.h"
 #include "modules/webdatabase/QuotaTracker.h"
 #include "modules/webdatabase/sqlite/SQLiteFileSystem.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "platform/weborigin/SecurityOriginHash.h"
 #include "public/platform/Platform.h"
@@ skipping 159 matching lines @@
 
     DatabaseSet* databaseSet = nameMap->get(name);
     if (!databaseSet)
         return;
 
     // We have to call closeImmediately() on the context thread.
     for (DatabaseSet::iterator it = databaseSet->begin(); it != databaseSet->end(); ++it)
         (*it)->getDatabaseContext()->getExecutionContext()->postTask(BLINK_FROM_HERE, CloseOneDatabaseImmediatelyTask::create(originString, name, *it));
 }
 
+void DatabaseTracker::forEachOpenDatabaseInPage(Page* page, PassOwnPtr<DatabaseCallback> callback)
+{
+    MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
+    if (!m_openDatabaseMap)
+        return;
+    for (auto& originMap : *m_openDatabaseMap) {
+        for (auto& nameDatabaseSet : *originMap.value) {
+            for (Database* database : *nameDatabaseSet.value) {
+                ExecutionContext* context = database->getExecutionContext();
+                ASSERT(context->isDocument());
+                if (toDocument(context)->frame()->page() == page)
+                    (*callback)(database);
+            }
+        }
+    }
+}
+
 void DatabaseTracker::closeOneDatabaseImmediately(const String& originString, const String& name, Database* database)
 {
     // First we have to confirm the 'database' is still in our collection.
     {
         MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
         if (!m_openDatabaseMap)
             return;
 
         DatabaseNameMap* nameMap = m_openDatabaseMap->get(originString);
         if (!nameMap)
             return;
 
         DatabaseSet* databaseSet = nameMap->get(name);
         if (!databaseSet)
             return;
 
         DatabaseSet::iterator found = databaseSet->find(database);
         if (found == databaseSet->end())
             return;
     }
 
     // And we have to call closeImmediately() without our collection lock being held.
     database->closeImmediately();
 }
 
 } // namespace blink