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

chrome/browser/renderer_host/render_message_filter_mac.mm

Index: chrome/browser/renderer_host/render_message_filter_mac.mm
diff --git a/chrome/browser/renderer_host/render_message_filter_mac.mm b/chrome/browser/renderer_host/render_message_filter_mac.mm
index dd80f2edb381e8b4e93d79d16852e91bf50f009c..c6aba1ec1b18bdbe37d8da105e9714476596ebc6 100644
--- a/chrome/browser/renderer_host/render_message_filter_mac.mm
+++ b/chrome/browser/renderer_host/render_message_filter_mac.mm
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -10,6 +10,8 @@
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/browser_thread.h"
 #import "chrome/browser/ui/cocoa/find_pasteboard.h"
+#import "chrome/browser/ui/cocoa/lookup_in_dictionary.h"
+#include "gfx/rect.h"
 
 // The number of utf16 code units that will be written to the find pasteboard,
 // longer texts are silently ignored. This is to prevent that a compromised
@@ -41,3 +43,25 @@ void RenderMessageFilter::OnClipboardFindPboardWriteString(
     }
   }
 }
+
+void RenderMessageFilter::OnGotCharacterIndexForPoint(uint index) {
+  LookupInDictionary* service = LookupInDictionary::GetInstance();
+  service->SetCharacterIndexAndSignal(index);
+}
+
+void RenderMessageFilter::OnGotFirstRectForRange(const gfx::Rect& rect) {
+  CGRect cgrect(rect.ToCGRect());
+  LookupInDictionary* service = LookupInDictionary::GetInstance();
+  service->SetFirstRectAndSignal(NSRectFromCGRect(rect.ToCGRect()));
+}
+
+void RenderMessageFilter::OnGotStringFromRange(const string16& string) {
+  LookupInDictionary* service = LookupInDictionary::GetInstance();
+  if (!string.length()) {
+    service->SetSubstringAndSignal(nil);
+  } else {
+    NSData* data = [NSData dataWithBytes:string.data() length:string.length()];
+    NSAttributedString* string = [NSUnarchiver unarchiveObjectWithData:data];
+    service->SetSubstringAndSignal(string);
+  }
+}