[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

chrome/renderer/render_view.cc

Index: chrome/renderer/render_view.cc
diff --git a/chrome/renderer/render_view.cc b/chrome/renderer/render_view.cc
index a74c8cd8eef478fa69c1348c2f2a612ae1ec8200..4872718a9689338ed5e7848bda063685a6e28c5f 100644
--- a/chrome/renderer/render_view.cc
+++ b/chrome/renderer/render_view.cc
@@ -91,6 +91,7 @@
 #include "chrome/renderer/searchbox.h"
 #include "chrome/renderer/speech_input_dispatcher.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
+#include "chrome/renderer/text_input_client_observer.h"
 #include "chrome/renderer/translate_helper.h"
 #include "chrome/renderer/user_script_idle_scheduler.h"
 #include "chrome/renderer/user_script_slave.h"
@@ -613,6 +614,12 @@ RenderView::RenderView(RenderThreadBase* render_thread,
   AutoFillAgent* autofill_agent = new AutoFillAgent(this,
                                                     password_autofill_manager);
 
+#if defined(OS_MACOSX)
+  // Create the message filter for the TextInputClient.
+  TextInputClientObserver* input_client = new TextInputClientObserver(this);
+  input_client->render_view();  // Avoid unused variable warning.
+#endif  // defined(OS_MACOSX)
+
   webwidget_ = WebView::create(this, devtools_agent_, autofill_agent);
   g_view_map.Get().insert(std::make_pair(webview(), this));
   webkit_preferences_.Apply(webview());
@@ -2203,18 +2210,25 @@ void RenderView::didChangeSelection(bool is_empty_selection) {
     // Sometimes we get repeated didChangeSelection calls from webkit when
     // the selection hasn't actually changed. We don't want to report these
     // because it will cause us to continually claim the X clipboard.
-    const std::string& this_selection =
-        webview()->focusedFrame()->selectionAsText().utf8();
+    WebFrame* frame = webview()->focusedFrame();
+    const std::string& this_selection = frame->selectionAsText().utf8();
     if (this_selection == last_selection_)
       return;
 
+    WebRange range = frame->selectionRange();
     Send(new ViewHostMsg_SelectionChanged(routing_id_,
-         this_selection));
+         this_selection, range.startOffset(), range.endOffset()));
     last_selection_ = this_selection;
   } else {
     last_selection_.clear();
-    Send(new ViewHostMsg_SelectionChanged(routing_id_,
-         last_selection_));
+    WebRange range = webwidget_->caretOrSelectionRange();
+    if (!range.isNull()) {
+      Send(new ViewHostMsg_SelectionChanged(routing_id_,
+           last_selection_, range.startOffset(), range.endOffset()));
+    } else {
+      Send(new ViewHostMsg_SelectionChanged(routing_id_,
+           last_selection_, 0, 0));
+    }
   }
 #endif  // defined(OS_POSIX)
 }