Allow tap gestures to open the IME on Android.

content/renderer/render_widget.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 #include <vector>
@@ skipping 167 matching lines @@
                          bool scroll_far,
                          const SmoothScrollCompletionCallback& callback);
 
   // Close the underlying WebWidget.
   virtual void Close();
 
   float filtered_time_per_frame() const {
     return filtered_time_per_frame_;
   }
 
+  enum ShowIme {
+    DO_NOT_SHOW_IME,
+    SHOW_IME_IF_NEEDED
+  };
+
  protected:
   // Friend RefCounted so that the dtor can be non-public. Using this class
   // without ref-counting is an error.
   friend class base::RefCounted<RenderWidget>;
   // For unit tests.
   friend class content::RenderWidgetTest;
 
   enum ResizeAck {
     SEND_RESIZE_ACK,
     NO_RESIZE_ACK,
@@ skipping 146 matching lines @@
   void set_next_paint_is_resize_ack();
   void set_next_paint_is_restore_ack();
   void set_next_paint_is_repaint_ack();
 
   void set_throttle_input_events(bool throttle_input_events) {
     throttle_input_events_ = throttle_input_events;
   }
 
   // Checks if the text input state and compose inline mode have been changed.
   // If they are changed, the new value will be sent to the browser process.
-  void UpdateTextInputState();
+  // |show_ime_if_needed| should be SHOW_IME_IF_NEEDED iff the update may cause
+  // the ime to be displayed, e.g. after a tap on an input field on mobile.
+  void UpdateTextInputState(ShowIme show_ime);
 
   // Checks if the selection bounds have been changed. If they are changed,
   // the new value will be sent to the browser process.
   virtual void UpdateSelectionBounds();
 
   // Checks if the composition range or composition character bounds have been
   // changed. If they are changed, the new value will be sent to the browser
   // process.
   virtual void UpdateCompositionInfo(
       const ui::Range& range,
@@ skipping 238 matching lines @@
   // State associated with the BeginSmoothScroll synthetic scrolling function.
   int next_smooth_scroll_gesture_id_;
   typedef std::map<int, SmoothScrollCompletionCallback>
       PendingSmoothScrollGestureMap;
   PendingSmoothScrollGestureMap pending_smooth_scroll_gestures_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_