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

chrome/browser/renderer_host/render_widget_host_view_mac.h

Index: chrome/browser/renderer_host/render_widget_host_view_mac.h
diff --git a/chrome/browser/renderer_host/render_widget_host_view_mac.h b/chrome/browser/renderer_host/render_widget_host_view_mac.h
index 0ddfbbab5b4c39f518c095960a1c6087334ead98..5af200d78a7f044c7a505609116e88d778085205 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.h
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 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.
 
@@ -73,12 +73,6 @@ class RWHVMEditCommandHelper;
   // Represents the input-method attributes supported by this object.
   scoped_nsobject<NSArray> validAttributesForMarkedText_;
 
-  // Represents the cursor position in this view coordinate.
-  // The renderer sends the cursor position through an IPC message.
-  // We save the latest cursor position here and return it when an input
-  // methods needs it.
-  NSRect caretRect_;
-
   // Indicates if we are currently handling a key down event.
   BOOL handlingKeyDown_;
 
@@ -95,11 +89,7 @@ class RWHVMEditCommandHelper;
   // the whole content yet.
   NSRange markedRange_;
 
-  // The selected range inside current marked text.
-  // TODO(suzhe): Currently it's only valid when there is any marked text.
-  // In the future, we may need to support accessing the whole content of the
-  // DOM node being edited, then this should be the selected range inside the
-  // DOM node.
+  // The selected range, cached from a message sent by the renderer.
   NSRange selectedRange_;
 
   // Text to be inserted which was generated by handling a key down event.
@@ -124,8 +114,6 @@ class RWHVMEditCommandHelper;
   int pluginImeIdentifier_;
 }
 
-@property(assign, nonatomic) NSRect caretRect;
-
 - (void)setCanBeKeyView:(BOOL)can;
 - (void)setTakesFocusOnlyOnMouseDown:(BOOL)b;
 - (void)setCloseOnDeactivate:(BOOL)b;
@@ -205,7 +193,7 @@ class RenderWidgetHostViewMac : public RenderWidgetHostView {
   virtual void WillDestroyRenderWidget(RenderWidgetHost* rwh) {};
   virtual void Destroy();
   virtual void SetTooltipText(const std::wstring& tooltip_text);
-  virtual void SelectionChanged(const std::string& text);
+  virtual void SelectionChanged(const std::string& text, int start, int end);
   virtual BackingStore* AllocBackingStore(const gfx::Size& size);
   virtual void SetTakesFocusOnlyOnMouseDown(bool flag);
   virtual gfx::Rect GetWindowRect();