Introduce WebInputMethodController to blink

third_party/WebKit/Source/web/WebViewImpl.h

Index: third_party/WebKit/Source/web/WebViewImpl.h
diff --git a/third_party/WebKit/Source/web/WebViewImpl.h b/third_party/WebKit/Source/web/WebViewImpl.h
index ce5ae7056a588e124cc03dd303514ea26dbd0121..b5bc01a98f9949ba4611ef18050b3f10dc814b58 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.h
+++ b/third_party/WebKit/Source/web/WebViewImpl.h
@@ -84,6 +84,7 @@ class UserGestureToken;
 class WebActiveGestureAnimation;
 class WebDevToolsAgentImpl;
 class WebElement;
+class WebInputMethodControllerImpl;
 class WebLayerTreeView;
 class WebLocalFrame;
 class WebLocalFrameImpl;
@@ -135,13 +136,6 @@ public:
         float topControlsShownRatioDelta) override;
     void mouseCaptureLost() override;
     void setFocus(bool enable) override;
-    bool setComposition(
-        const WebString& text,
-        const WebVector<WebCompositionUnderline>& underlines,
-        int selectionStart,
-        int selectionEnd) override;
-    bool commitText(const WebString& text, int relativeCaretPosition) override;
-    bool finishComposingText(ConfirmCompositionBehavior selectionBehavior) override;
     WebRange compositionRange() override;
     WebTextInputInfo textInputInfo() override;
     WebTextInputType textInputType() override;
@@ -509,6 +503,11 @@ public:
     ChromeClientImpl& chromeClient() const { return *m_chromeClientImpl.get(); }
 
 private:
+    // Returns the currently active WebInputMethodController which the one
+    // corresponding to the focused frame. It will return nullptr if there are
+    // none or |m_imeAcceptEvents| is false.
+    WebInputMethodControllerImpl* getActiveWebInputMethodController() const;
+
     InspectorOverlay* inspectorOverlay();
 
     void setPageScaleFactorAndLocation(float, const FloatPoint&);