Implement IME for Mac plugins using the Cocoa event model on 10.6

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 f41ae8d830acaf2d98f064925a7e68f74b69c7ce..b9e41f9e1f3507c9d84c8f5b8423c0b6386d1b35 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.h
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.h
@@ -124,6 +124,9 @@ class RWHVMEditCommandHelper;
   // handling a key down event, not including inserting commands, eg. insertTab,
   // etc.
   EditCommands editCommands_;
+
+  // The plugin for which IME is currently enabled (-1 if not enabled).
+  int pluginImeIdentifier_;
 }
 
 @property(assign, nonatomic) NSRect caretRect;
@@ -145,6 +148,11 @@ class RWHVMEditCommandHelper;
 - (void)setAccessibilityTreeRoot:(BrowserAccessibility*) treeRoot;
 // Confirm ongoing composition.
 - (void)confirmComposition;
+// Enables or disables plugin IME for the given plugin.
+- (void)setPluginImeEnabled:(BOOL)enabled forPlugin:(int)pluginId;
+// Evaluates the event in the context of plugin IME, if plugin IME is enabled.
+// Returns YES if the event was handled.
+- (BOOL)postProcessEventForPluginIme:(NSEvent*)event;
 
 @end
 
@@ -224,6 +232,10 @@ class RenderWidgetHostViewMac : public RenderWidgetHostView {
   virtual void OnAccessibilityNotifications(
       const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params);
 
+  virtual void SetPluginImeEnabled(bool enabled, int plugin_id);
+  virtual bool PostProcessEventForPluginIme(
+      const NativeWebKeyboardEvent& event);
+
   // Methods associated with GPU-accelerated plug-in instances and the
   // accelerated compositor.
   virtual gfx::PluginWindowHandle AllocateFakePluginWindowHandle(bool opaque,
@@ -263,6 +275,9 @@ class RenderWidgetHostViewMac : public RenderWidgetHostView {
 
   void SetTextInputActive(bool active);
 
+  // Sends confirmed plugin IME text back to the renderer.
+  void PluginImeCompositionConfirmed(const string16& text, int plugin_id);
+
   const std::string& selected_text() const { return selected_text_; }
 
   // These member variables should be private, but the associated ObjC class