Introduce WebInputMethodController to blink

third_party/WebKit/Source/web/WebViewFrameWidget.h

Index: third_party/WebKit/Source/web/WebViewFrameWidget.h
diff --git a/third_party/WebKit/Source/web/WebViewFrameWidget.h b/third_party/WebKit/Source/web/WebViewFrameWidget.h
index 9ef1278630d4b8c6ff393665b38b9de5886ce069..7a03e87a734021a2ee919e63571aee7a48f0761b 100644
--- a/third_party/WebKit/Source/web/WebViewFrameWidget.h
+++ b/third_party/WebKit/Source/web/WebViewFrameWidget.h
@@ -13,6 +13,7 @@
 
 namespace blink {
 
+class WebInputMethodControllerImpl;
 class WebViewImpl;
 class WebWidgetClient;
 
@@ -94,6 +95,7 @@ public:
     void setIsTransparent(bool) override;
     void setBaseBackgroundColor(WebColor) override;
     WebLocalFrameImpl* localRoot() override;
+    WebInputMethodControllerImpl* getActiveWebInputMethodController() const;
 
     // WebFrameWidgetBase overrides:
     bool forSubframe() const override { return false; }