Handful of tweaks for tab dragging with touch:

ui/aura/test/event_generator.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 UI_AURA_TEST_EVENT_GENERATOR_H_
 #define UI_AURA_TEST_EVENT_GENERATOR_H_
 
 #include "base/basictypes.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/gfx/point.h"
@@ skipping 18 matching lines @@
   // Creates an EventGenerator with the mouse/touch location
   // at |initial_location|.
   EventGenerator(RootWindow* root_window, const gfx::Point& initial_location);
 
   // Creates an EventGenerator with the mouse/touch location
   // centered over |window|.
   EventGenerator(RootWindow* root_window, Window* window);
 
   virtual ~EventGenerator();
 
+  // Explicitly sets the location used by mouse/touch events. This is set by the
+  // various methods that take a location but can be manipulated directly,
+  // typically for touch.
+  void set_current_location(const gfx::Point& location) {
+    current_location_ = location;
+  }
   const gfx::Point& current_location() const { return current_location_; }
 
   // Resets the event flags bitmask.
   void set_flags(int flags) { flags_ = flags; }
 
   // Generates a left button press event.
   void PressLeftButton();
 
   // Generates a left button release event.
   void ReleaseLeftButton();
@@ skipping 34 matching lines @@
   void DragMouseBy(int dx, int dy) {
     DragMouseTo(current_location_.Add(gfx::Point(dx, dy)));
   }
 
   // Generates events to move the mouse to the center of the window.
   void MoveMouseToCenterOf(Window* window);
 
   // Generates a touch press event.
   void PressTouch();
 
+  // Generates a ET_TOUCH_MOVED event to |point|.
+  void MoveTouch(const gfx::Point& point);
+
   // Generates a touch release event.
   void ReleaseTouch();
 
   // Generates press, move and release event to move touch
   // to be the given |point|.
   void PressMoveAndReleaseTouchTo(const gfx::Point& point);
 
   void PressMoveAndReleaseTouchTo(int x, int y) {
     PressMoveAndReleaseTouchTo(gfx::Point(x, y));
   }
@@ skipping 49 matching lines @@
   int flags_;
   gfx::Point current_location_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGenerator);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_EVENT_GENERATOR_H_