Add an interface to gather text surrounding the selection.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 2f0322f30311b79dae940d09a35013bce3206172..99acd4af35687d97ca043a717e3cd2c3ff007372 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -1539,14 +1539,10 @@ void ContentViewCoreImpl::OnTextSurroundingSelectionResponse(
     const base::string16& content,
     int start_offset,
     int end_offset) {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null())
-    return;
-
-  ScopedJavaLocalRef<jstring> jcontent = ConvertUTF16ToJavaString(env, content);
-  Java_ContentViewCore_onTextSurroundingSelectionResponse(
-      env, obj.obj(), jcontent.obj(), start_offset, end_offset);
+  if (text_surroundings_delegate_ != NULL) {
+    text_surroundings_delegate_->OnTextSurroundingSelectionResponse(
+        content, start_offset, end_offset);
+  }
 }
 
 void ContentViewCoreImpl::SendOrientationChangeEventInternal() {
@@ -1615,8 +1611,7 @@ void ContentViewCoreImpl::SetBackgroundOpaque(JNIEnv* env, jobject jobj,
     GetRenderWidgetHostViewAndroid()->SetBackgroundOpaque(opaque);
 }
 
-void ContentViewCoreImpl::TextSurroundingSelectionRequest(
-    JNIEnv*, jobject, jint max_length) {
+void ContentViewCoreImpl::TextSurroundingSelectionRequest(int max_length) {
   RenderFrameHost* focused_frame = web_contents_->GetFocusedFrame();
 
   focused_frame->Send(new FrameMsg_TextSurroundingSelectionRequest(