websql: Remove unused member sharable_.

Change-Id: I485e771fa8e7911565a9cd99209145b1cf26450c
Reviewed-on: https://chromium-review.googlesource.com/c/1343572Reviewed-by: Joshua Bell <jsbell@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609755}

third_party/blink/renderer/modules/webdatabase/sqlite/sqlite_database.cc

@@ -47,9 +47,6 @@ SQLiteDatabase::SQLiteDatabase()
     : db_(nullptr),
       page_size_(-1),
       transaction_in_progress_(false),
-#if DCHECK_IS_ON()
-      sharable_(false),
-#endif
       opening_thread_(0),
       open_error_(SQLITE_ERROR),
       open_error_message_(),

third_party/blink/renderer/modules/webdatabase/sqlite/sqlite_database.h

@@ -35,10 +35,6 @@
 #include "third_party/blink/renderer/platform/wtf/threading.h"
 #include "third_party/blink/renderer/platform/wtf/threading_primitives.h"
 
-#if defined(COMPILER_MSVC)
-#pragma warning(disable : 4800)
-#endif
-
 struct sqlite3;
 
 namespace blink {
@@ -97,7 +93,7 @@ class SQLiteDatabase {
 
   sqlite3* Sqlite3Handle() const {
 #if DCHECK_IS_ON()
-    DCHECK_EQ(sharable_ || CurrentThread(), opening_thread_ || !db_);
+    DCHECK_EQ(!!CurrentThread(), opening_thread_ || !db_);
 #endif
     return db_;
   }
@@ -140,9 +136,6 @@ class SQLiteDatabase {
   int page_size_;
 
   bool transaction_in_progress_;
-#if DCHECK_IS_ON()
-  bool sharable_;
-#endif
 
   Mutex authorizer_lock_;
   CrossThreadPersistent<DatabaseAuthorizer> authorizer_;