Rename IndexedDB namepsace to indexed_db

https://google.github.io/styleguide/cppguide.html#Namespace_Names
> Namespace names are all lower-case.

This CL has no behavior changes.

Bug: 889726
Change-Id: I95717738ae95c2cee3caa3ff75e43be068e02bc0
Reviewed-on: https://chromium-review.googlesource.com/c/1314075Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Zhuoyu Qian <zhuoyu.qian@samsung.com>
Cr-Commit-Position: refs/heads/master@{#605236}

third_party/blink/renderer/modules/indexeddb/idb_index.cc

@@ -153,7 +153,7 @@ IDBRequest* IDBIndex::openCursor(ScriptState* script_state,
                                  IDBRequest::AsyncTraceState metrics) {
   IDBRequest* request = IDBRequest::Create(
       script_state, this, transaction_.Get(), std::move(metrics));
-  request->SetCursorDetails(IndexedDB::kCursorKeyAndValue, direction);
+  request->SetCursorDetails(indexed_db::kCursorKeyAndValue, direction);
   BackendDB()->OpenCursor(transaction_->Id(), object_store_->Id(), Id(),
                           key_range, direction, false, kWebIDBTaskTypeNormal,
                           request->CreateWebCallbacks().release());
@@ -228,7 +228,7 @@ IDBRequest* IDBIndex::openKeyCursor(ScriptState* script_state,
 
   IDBRequest* request = IDBRequest::Create(
       script_state, this, transaction_.Get(), std::move(metrics));
-  request->SetCursorDetails(IndexedDB::kCursorKeyOnly, direction);
+  request->SetCursorDetails(indexed_db::kCursorKeyOnly, direction);
   BackendDB()->OpenCursor(transaction_->Id(), object_store_->Id(), Id(),
                           key_range, direction, true, kWebIDBTaskTypeNormal,
                           request->CreateWebCallbacks().release());

third_party/blink/renderer/modules/indexeddb/idb_object_store.cc

@@ -990,7 +990,7 @@ IDBRequest* IDBObjectStore::openCursor(ScriptState* script_state,
                                        IDBRequest::AsyncTraceState metrics) {
   IDBRequest* request = IDBRequest::Create(
       script_state, this, transaction_.Get(), std::move(metrics));
-  request->SetCursorDetails(IndexedDB::kCursorKeyAndValue, direction);
+  request->SetCursorDetails(indexed_db::kCursorKeyAndValue, direction);
 
   BackendDB()->OpenCursor(transaction_->Id(), Id(),
                           IDBIndexMetadata::kInvalidId, range, direction, false,
@@ -1033,7 +1033,7 @@ IDBRequest* IDBObjectStore::openKeyCursor(ScriptState* script_state,
 
   IDBRequest* request = IDBRequest::Create(
       script_state, this, transaction_.Get(), std::move(metrics));
-  request->SetCursorDetails(IndexedDB::kCursorKeyOnly, direction);
+  request->SetCursorDetails(indexed_db::kCursorKeyOnly, direction);
 
   BackendDB()->OpenCursor(transaction_->Id(), Id(),
                           IDBIndexMetadata::kInvalidId, key_range, direction,

third_party/blink/renderer/modules/indexeddb/idb_request.cc

@@ -239,7 +239,7 @@ void IDBRequest::Abort() {
   request_aborted_ = true;
 }
 
-void IDBRequest::SetCursorDetails(IndexedDB::CursorType cursor_type,
+void IDBRequest::SetCursorDetails(indexed_db::CursorType cursor_type,
                                   WebIDBCursorDirection direction) {
   DCHECK_EQ(ready_state_, PENDING);
   DCHECK(!pending_cursor_);
@@ -460,11 +460,11 @@ void IDBRequest::EnqueueResponse(std::unique_ptr<WebIDBCursor> backend,
   DCHECK(!source.IsNull());
 
   switch (cursor_type_) {
-    case IndexedDB::kCursorKeyOnly:
+    case indexed_db::kCursorKeyOnly:
       cursor = IDBCursor::Create(std::move(backend), cursor_direction_, this,
                                  source, transaction_.Get());
       break;
-    case IndexedDB::kCursorKeyAndValue:
+    case indexed_db::kCursorKeyAndValue:
       cursor = IDBCursorWithValue::Create(std::move(backend), cursor_direction_,
                                           this, source, transaction_.Get());
       break;

third_party/blink/renderer/modules/indexeddb/idb_request.h

@@ -217,7 +217,7 @@ class MODULES_EXPORT IDBRequest : public EventTargetWithInlineData,
   DEFINE_ATTRIBUTE_EVENT_LISTENER(success, kSuccess);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(error, kError);
 
-  void SetCursorDetails(IndexedDB::CursorType, WebIDBCursorDirection);
+  void SetCursorDetails(indexed_db::CursorType, WebIDBCursorDirection);
   void SetPendingCursor(IDBCursor*);
   void Abort();
 
@@ -390,7 +390,7 @@ class MODULES_EXPORT IDBRequest : public EventTargetWithInlineData,
   Member<EventQueue> event_queue_;
 
   // Only used if the result type will be a cursor.
-  IndexedDB::CursorType cursor_type_ = IndexedDB::kCursorKeyAndValue;
+  indexed_db::CursorType cursor_type_ = indexed_db::kCursorKeyAndValue;
   WebIDBCursorDirection cursor_direction_ = kWebIDBCursorDirectionNext;
   // When a cursor is continued/advanced, |result_| is cleared and
   // |pendingCursor_| holds it.

third_party/blink/renderer/modules/indexeddb/indexed_db.h

@@ -28,11 +28,11 @@
 
 namespace blink {
 
-namespace IndexedDB {
+namespace indexed_db {
 
 enum CursorType { kCursorKeyAndValue = 0, kCursorKeyOnly };
 
-}  // namespace IndexedDB
+}  // namespace indexed_db
 
 }  // namespace blink
 

third_party/blink/tools/blinkpy/presubmit/audit_non_blink_usage.py

@@ -402,6 +402,14 @@ _CONFIG = [
             'display::Display',
         ],
     },
+    {
+        'paths': [
+            'third_party/blink/renderer/modules/indexeddb/',
+        ],
+        'allowed': [
+            'indexed_db::.+',
+        ],
+    },
     {
         'paths': [
             'third_party/blink/renderer/modules/webgpu/',