Copy a few selection related methods to WebFrame from WebView.

Source/web/WebFrameImpl.cpp

Index: Source/web/WebFrameImpl.cpp
diff --git a/Source/web/WebFrameImpl.cpp b/Source/web/WebFrameImpl.cpp
index 4fc38f19600ea2535cdb3a57cc34c404476d5486..7453ee2531db3a628d8efabbed6b8deafc433d5b 100644
--- a/Source/web/WebFrameImpl.cpp
+++ b/Source/web/WebFrameImpl.cpp
@@ -74,6 +74,7 @@
 
 #include <algorithm>
 #include "AssociatedURLLoader.h"
+#include "CompositionUnderlineVectorBuilder.h"
 #include "EventListenerWrapper.h"
 #include "FindInPageCoordinates.h"
 #include "HTMLNames.h"
@@ -1359,6 +1360,36 @@ void WebFrameImpl::moveCaretSelection(const WebPoint& point)
     frame()->selection().moveTo(position, UserTriggered);
 }
 
+bool WebFrameImpl::setEditableSelectionOffsets(int start, int end)
+{
+    return frame()->inputMethodController().setEditableSelectionOffsets(PlainTextRange(start, end));
+}
+
+bool WebFrameImpl::setCompositionFromExistingText(int compositionStart, int compositionEnd, const WebVector<WebCompositionUnderline>& underlines)
+{
+    if (!frame()->editor().canEdit())
+        return false;
+
+    InputMethodController& inputMethodController = frame()->inputMethodController();
+    inputMethodController.cancelComposition();
+
+    if (compositionStart == compositionEnd)
+        return true;
+
+    inputMethodController.setCompositionFromExistingText(CompositionUnderlineVectorBuilder(underlines), compositionStart, compositionEnd);
+
+    return true;
+}
+
+void WebFrameImpl::extendSelectionAndDelete(int before, int after)
+{
+    if (WebPlugin* plugin = focusedPluginIfInputMethodSupported()) {
+        plugin->extendSelectionAndDelete(before, after);
+        return;
+    }
+    frame()->inputMethodController().extendSelectionAndDelete(before, after);
+}
+
 void WebFrameImpl::setCaretVisible(bool visible)
 {
     frame()->selection().setCaretVisible(visible);
@@ -1378,6 +1409,14 @@ VisiblePosition WebFrameImpl::visiblePositionForWindowPoint(const WebPoint& poin
     return VisiblePosition();
 }
 
+WebPlugin* WebFrameImpl::focusedPluginIfInputMethodSupported()
+{
+    WebPluginContainerImpl* container = WebFrameImpl::pluginContainerFromNode(frame(), WebNode(frame()->document()->focusedElement()));
+    if (container && container->supportsInputMethod())
+        return container->plugin();
+    return 0;
+}
+
 int WebFrameImpl::printBegin(const WebPrintParams& printParams, const WebNode& constrainToNode)
 {
     ASSERT(!frame()->document()->isFrameSet());