Only support left/right maximizing at 50% width when the --ash-enable-alternate-caption-button

ash/accelerators/accelerator_controller_unittest.cc

Index: ash/accelerators/accelerator_controller_unittest.cc
diff --git a/ash/accelerators/accelerator_controller_unittest.cc b/ash/accelerators/accelerator_controller_unittest.cc
index 4c00f72734149fb158380a5edab6b0ca8579c21d..cf796890390ae571bdeea573c1087ea87ae75d85 100644
--- a/ash/accelerators/accelerator_controller_unittest.cc
+++ b/ash/accelerators/accelerator_controller_unittest.cc
@@ -501,28 +501,12 @@ TEST_F(AcceleratorControllerTest, WindowSnap) {
   wm::ActivateWindow(window.get());
 
   {
+    gfx::Rect window_bounds = window->bounds();
     GetController()->PerformAction(WINDOW_SNAP_LEFT, dummy);
-    gfx::Rect snap_left = window->bounds();
-    GetController()->PerformAction(WINDOW_SNAP_LEFT, dummy);
-    EXPECT_NE(window->bounds().ToString(), snap_left.ToString());
-    GetController()->PerformAction(WINDOW_SNAP_LEFT, dummy);
-    EXPECT_NE(window->bounds().ToString(), snap_left.ToString());
-
-    // It should cycle back to the first snapped position.
-    GetController()->PerformAction(WINDOW_SNAP_LEFT, dummy);
-    EXPECT_EQ(window->bounds().ToString(), snap_left.ToString());
-  }
-  {
-    GetController()->PerformAction(WINDOW_SNAP_RIGHT, dummy);
-    gfx::Rect snap_right = window->bounds();
-    GetController()->PerformAction(WINDOW_SNAP_RIGHT, dummy);
-    EXPECT_NE(window->bounds().ToString(), snap_right.ToString());
-    GetController()->PerformAction(WINDOW_SNAP_RIGHT, dummy);
-    EXPECT_NE(window->bounds().ToString(), snap_right.ToString());
-
-    // It should cycle back to the first snapped position.
+    EXPECT_NE(window->bounds().ToString(), window_bounds.ToString());

[Mr4D (OOO till 08-26), 2013/08/29 01:03:15]

Could you do some more tests towards the result (e.g. left side = 0, right side
~half width, ...)?

+    window_bounds = window->bounds();
     GetController()->PerformAction(WINDOW_SNAP_RIGHT, dummy);
-    EXPECT_EQ(window->bounds().ToString(), snap_right.ToString());
+    EXPECT_NE(window->bounds().ToString(), window_bounds.ToString());

[Mr4D (OOO till 08-26), 2013/08/29 01:03:15]

Same here.

   }
   {
     gfx::Rect normal_bounds = window->bounds();