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

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

Index: third_party/WebKit/Source/modules/webdatabase/DatabaseTracker.cpp
diff --git a/third_party/WebKit/Source/modules/webdatabase/DatabaseTracker.cpp b/third_party/WebKit/Source/modules/webdatabase/DatabaseTracker.cpp
index 434a9c5e9cb03bf7e777a24367a39a585e4a079c..b5781883a54012878b0c3784dcc21603379c68e8 100644
--- a/third_party/WebKit/Source/modules/webdatabase/DatabaseTracker.cpp
+++ b/third_party/WebKit/Source/modules/webdatabase/DatabaseTracker.cpp
@@ -35,6 +35,7 @@
 #include "modules/webdatabase/Database.h"
 #include "modules/webdatabase/DatabaseClient.h"
 #include "modules/webdatabase/DatabaseContext.h"
+#include "modules/webdatabase/InspectorDatabaseAgent.h"
 #include "modules/webdatabase/QuotaTracker.h"
 #include "modules/webdatabase/sqlite/SQLiteFileSystem.h"
 #include "platform/weborigin/SecurityOrigin.h"
@@ -209,6 +210,20 @@ void DatabaseTracker::closeDatabasesImmediately(SecurityOrigin* origin, const St
         (*it)->getDatabaseContext()->getExecutionContext()->postTask(BLINK_FROM_HERE, CloseOneDatabaseImmediatelyTask::create(originString, name, *it));
 }
 
+void DatabaseTracker::registerAllDatabasesInInspector(InspectorDatabaseAgent* agent)
+{
+    MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
+    if (!m_openDatabaseMap)
+        return;
+    for (auto& originMap : *m_openDatabaseMap) {
+        for (auto& nameDatabaseSet : *originMap.value) {
+            for (Database* database : *nameDatabaseSet.value) {
+                agent->didOpenDatabase(database, database->getSecurityOrigin()->host(), database->displayName(), database->version());
+            }
+        }
+    }
+}
+
 void DatabaseTracker::closeOneDatabaseImmediately(const String& originString, const String& name, Database* database)
 {
     // First we have to confirm the 'database' is still in our collection.