Added touch event permutations test to touch_exploration_controller.

ui/chromeos/touch_exploration_controller.cc

Index: ui/chromeos/touch_exploration_controller.cc
diff --git a/ui/chromeos/touch_exploration_controller.cc b/ui/chromeos/touch_exploration_controller.cc
index 31e1a3a8324945c3f0a2c862ba9491d1f77304c8..290eae0e38e801295c76cb7132bd20d86d925d3f 100644
--- a/ui/chromeos/touch_exploration_controller.cc
+++ b/ui/chromeos/touch_exploration_controller.cc
@@ -54,8 +54,8 @@ ui::EventRewriteStatus TouchExplorationController::RewriteEvent(
   if (!event.IsTouchEvent()) {
     if (event.IsKeyEvent()) {
       const ui::KeyEvent& key_event = static_cast<const ui::KeyEvent&>(event);
-      VLOG(0) << "\nKeyboard event: " << key_event.name() << "\n"
-              << " Key code: " << key_event.key_code()
+      VLOG(0) << "\nKeyboard event: " << key_event.name()
+              << "\n Key code: " << key_event.key_code()
               << ", Flags: " << key_event.flags()
               << ", Is char: " << key_event.is_char();
     }
@@ -156,7 +156,7 @@ ui::EventRewriteStatus TouchExplorationController::InNoFingersDown(
     VLOG_STATE();
     return ui::EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();;
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
@@ -196,7 +196,7 @@ ui::EventRewriteStatus TouchExplorationController::InSingleTapPressed(
     }
     return EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();;
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
@@ -228,8 +228,12 @@ TouchExplorationController::InSingleTapOrTouchExploreReleased(
       state_ = NO_FINGERS_DOWN;
     }
     return ui::EVENT_REWRITE_DISCARD;
+  } else if (type == ui::ET_TOUCH_MOVED){
+    LOG(WARNING) << "TOUCH_MOVED in InSingleTapOrTouchExploreReleased"
+                 << " though there should not be any fingers down.";
+    return ui::EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";;
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
@@ -255,7 +259,7 @@ ui::EventRewriteStatus TouchExplorationController::InDoubleTapPressed(
   } else if (type == ui::ET_TOUCH_MOVED) {
     return ui::EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
@@ -286,7 +290,7 @@ ui::EventRewriteStatus TouchExplorationController::InTouchExploration(
     state_ = TOUCH_EXPLORE_RELEASED;
     VLOG_STATE();
   } else if (type != ui::ET_TOUCH_MOVED) {
-    NOTREACHED() << "Unexpected event type received.";
+    NOTREACHED() << "Unexpected event type received: " << event.name();
     return ui::EVENT_REWRITE_CONTINUE;
   }
 
@@ -352,7 +356,7 @@ ui::EventRewriteStatus TouchExplorationController::InTwoToOneFinger(
       return ui::EVENT_REWRITE_REWRITTEN;
     }
   }
-  NOTREACHED() << "Unexpected event type received";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
@@ -363,7 +367,7 @@ ui::EventRewriteStatus TouchExplorationController::InPassthrough(
 
   if (!(type == ui::ET_TOUCH_RELEASED || type == ui::ET_TOUCH_CANCELLED ||
         type == ui::ET_TOUCH_MOVED || type == ui::ET_TOUCH_PRESSED)) {
-    NOTREACHED() << "Unexpected event type received.";
+    NOTREACHED() << "Unexpected event type received: " << event.name();
     return ui::EVENT_REWRITE_CONTINUE;
   }
 
@@ -415,7 +419,7 @@ ui::EventRewriteStatus TouchExplorationController::InTouchExploreSecondPress(
     VLOG_STATE();
     return ui::EVENT_REWRITE_REWRITTEN;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
@@ -425,7 +429,7 @@ ui::EventRewriteStatus TouchExplorationController::InWaitForRelease(
   ui::EventType type = event.type();
   if (!(type == ui::ET_TOUCH_PRESSED || type == ui::ET_TOUCH_MOVED ||
         type == ui::ET_TOUCH_RELEASED || type == ui::ET_TOUCH_CANCELLED)) {
-    NOTREACHED() << "Unexpected event type received.";
+    NOTREACHED() << "Unexpected event type received: " << event.name();
     return ui::EVENT_REWRITE_CONTINUE;
   }
   if (current_touch_ids_.size() == 0) {