Redesigns the text input focus handling.

content/public/browser/render_widget_host_view.h

Index: content/public/browser/render_widget_host_view.h
diff --git a/content/public/browser/render_widget_host_view.h b/content/public/browser/render_widget_host_view.h
index 4c0df76ac21e17c3da87a3a86cd3d21dc9642047..7638a2e76d72f0e679af6ad59c1bb807a6d05dfe 100644
--- a/content/public/browser/render_widget_host_view.h
+++ b/content/public/browser/render_widget_host_view.h
@@ -20,6 +20,10 @@ class Rect;
 class Size;
 }
 
+namespace ui {
+class TextInputClient;
+}
+
 namespace content {
 
 class BrowserAccessibilityManager;
@@ -76,6 +80,13 @@ class CONTENT_EXPORT RenderWidgetHostView {
   virtual gfx::NativeViewId GetNativeViewId() const = 0;
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
 
+  // Returns a ui::TextInputClient to support text input or NULL if this RWHV
+  // doesn't support text input.
+  // Note: Not all the platforms use ui::InputMethod and ui::TextInputClient for
+  // text input.  Some of platforms (Mac and Android for example) use their own

[msw, 2014/05/02 18:46:03]

nit: "Some platforms" or "Some of the platforms"

[Yuki, 2014/05/07 05:58:02]

Done.

+  // text input system.
+  virtual ui::TextInputClient* GetTextInputClient() = 0;
+
   // Set focus to the associated View component.
   virtual void Focus() = 0;
   // Returns true if the View currently has the focus.