Move IME related functions from WebFrame to WebLocalFrame

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index 9e72f68e2ae62c3332868c6cfd7f90f856fb7cac..eb9faa89e6b43b554e7cac84ff9c469fa9332daf 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -2906,9 +2906,12 @@ WebFrame* WebViewImpl::findFrameByName(
     return WebLocalFrameImpl::fromFrame(toLocalFrame(frame));
 }
 
-WebFrame* WebViewImpl::focusedFrame()
+WebLocalFrame* WebViewImpl::focusedFrame()
 {
-    return WebFrame::fromFrame(focusedCoreFrame());
+    Frame* frame = focusedCoreFrame();
+    if (!frame || !frame->isLocalFrame())

[dcheng, 2016/06/13 17:29:45]

Let's just assert that this is local. All the return paths claim to return a
local frame already.

+        return nullptr;
+    return WebLocalFrameImpl::fromFrame(toLocalFrame(frame));
 }
 
 void WebViewImpl::setFocusedFrame(WebFrame* frame)