Add IdleSpellCheckCallback to LocalFrame

This patch makes each LocalFrame own an IdleSpellCheckCallback. Future
patches will make this callback handle spell checking in the frame when
IdleTimeSpellChecking is enabled.

BUG=517298

Review-Url: https://codereview.chromium.org/2581063002
Cr-Commit-Position: refs/heads/master@{#439042}

third_party/WebKit/Source/core/editing/spellcheck/IdleSpellCheckCallback.h

@@ -14,7 +14,6 @@ namespace blink {
 // Main class for the implementation of idle time spell checker.
 class IdleSpellCheckCallback final : public IdleRequestCallback {
  public:
-  // TODO(xiaochengh): Make each LocalFrame own an IdleSpellCheckCallback.
   static IdleSpellCheckCallback* create(LocalFrame&);
   ~IdleSpellCheckCallback() override;
 

third_party/WebKit/Source/core/frame/LocalFrame.cpp

@@ -40,6 +40,7 @@
 #include "core/editing/FrameSelection.h"
 #include "core/editing/InputMethodController.h"
 #include "core/editing/serializers/Serialization.h"
+#include "core/editing/spellcheck/IdleSpellCheckCallback.h"
 #include "core/editing/spellcheck/SpellChecker.h"
 #include "core/events/Event.h"
 #include "core/fetch/ResourceFetcher.h"
@@ -345,6 +346,7 @@ DEFINE_TRACE(LocalFrame) {
   visitor->trace(m_eventHandler);
   visitor->trace(m_console);
   visitor->trace(m_inputMethodController);
+  visitor->trace(m_idleSpellCheckCallback);
   Frame::trace(visitor);
   Supplementable<LocalFrame>::trace(visitor);
 }
@@ -885,6 +887,7 @@ inline LocalFrame::LocalFrame(FrameLoaderClient* client,
       m_eventHandler(new EventHandler(*this)),
       m_console(FrameConsole::create(*this)),
       m_inputMethodController(InputMethodController::create(*this)),
+      m_idleSpellCheckCallback(IdleSpellCheckCallback::create(*this)),
       m_navigationDisableCount(0),
       m_pageZoomFactor(parentPageZoomFactor(this)),
       m_textZoomFactor(parentTextZoomFactor(this)),

third_party/WebKit/Source/core/frame/LocalFrame.h

@@ -58,6 +58,7 @@ class FloatSize;
 class FrameConsole;
 class FrameSelection;
 class FrameView;
+class IdleSpellCheckCallback;
 class InputMethodController;
 class InstrumentingAgents;
 class InterfaceProvider;
@@ -144,6 +145,7 @@ class CORE_EXPORT LocalFrame final : public Frame,
   ScriptController& script() const;
   SpellChecker& spellChecker() const;
   FrameConsole& console() const;
+  IdleSpellCheckCallback& idleSpellCheckCallback() const;
 
   // This method is used to get the highest level LocalFrame in this
   // frame's in-process subtree.
@@ -258,6 +260,7 @@ class CORE_EXPORT LocalFrame final : public Frame,
   const Member<EventHandler> m_eventHandler;
   const Member<FrameConsole> m_console;
   const Member<InputMethodController> m_inputMethodController;
+  const Member<IdleSpellCheckCallback> m_idleSpellCheckCallback;
 
   int m_navigationDisableCount;
 
@@ -327,6 +330,11 @@ inline EventHandler& LocalFrame::eventHandler() const {
   return *m_eventHandler;
 }
 
+inline IdleSpellCheckCallback& LocalFrame::idleSpellCheckCallback() const {
+  DCHECK(m_idleSpellCheckCallback);
+  return *m_idleSpellCheckCallback;
+}
+
 DEFINE_TYPE_CASTS(LocalFrame,
                   Frame,
                   localFrame,