A couple of fixes to bubble view:

ui/views/bubble/bubble_frame_view_unittest.cc

Index: ui/views/bubble/bubble_frame_view_unittest.cc
diff --git a/ui/views/bubble/bubble_frame_view_unittest.cc b/ui/views/bubble/bubble_frame_view_unittest.cc
index 602d79f9de45a60cdcd131538db1cbfceff12aaa..b90615a6a5e81d2bde999e6307b264e59496f9af 100644
--- a/ui/views/bubble/bubble_frame_view_unittest.cc
+++ b/ui/views/bubble/bubble_frame_view_unittest.cc
@@ -228,6 +228,44 @@ TEST_F(BubbleFrameViewTest, GetUpdatedWindowBoundsMirroringFails) {
   EXPECT_EQ(BubbleBorder::TOP_LEFT, frame.bubble_border()->arrow_location());
 }
 
+TEST_F(BubbleFrameViewTest, TestMirroringForCenteredArrow) {

[msw, 2013/03/14 20:17:58]

I suspect this test will fail if the test machine has a larger screen size.
Can you generalize the anchor positioning to fit near the edge of any screen?
See gfx::Screen::GetScreenFor(...)->GetDisplayNearestWindow(...).bounds();

[varunjain, 2013/03/14 20:54:59]

I think the TestBubbleFrameView overrides the monitor bounds to 1000x1000 (line
70). So It does not matter what screen size the test runs on.

[msw, 2013/03/14 20:59:43]

Good call!

+  TestBubbleFrameView frame;
+
+  // Test bubble not fitting above the anchor.
+  frame.bubble_border()->set_arrow_location(BubbleBorder::BOTTOM_CENTER);
+  gfx::Rect window_bounds = frame.GetUpdatedWindowBounds(
+      gfx::Rect(100, 100, 50, 50),  // |anchor_rect|
+      gfx::Size(500, 700),          // |client_size|
+      true);                        // |adjust_if_offscreen|
+  EXPECT_EQ(BubbleBorder::TOP_CENTER, frame.bubble_border()->arrow_location());
+
+  // Test bubble not fitting below the anchor.
+  frame.bubble_border()->set_arrow_location(BubbleBorder::TOP_CENTER);
+  window_bounds = frame.GetUpdatedWindowBounds(
+      gfx::Rect(300, 800, 50, 50),  // |anchor_rect|
+      gfx::Size(500, 200),          // |client_size|
+      true);                        // |adjust_if_offscreen|
+  EXPECT_EQ(BubbleBorder::BOTTOM_CENTER,
+            frame.bubble_border()->arrow_location());
+
+  // Test bubble not fitting to the right of the anchor.
+  frame.bubble_border()->set_arrow_location(BubbleBorder::LEFT_CENTER);
+  window_bounds = frame.GetUpdatedWindowBounds(
+      gfx::Rect(800, 300, 50, 50),  // |anchor_rect|
+      gfx::Size(200, 500),          // |client_size|
+      true);                        // |adjust_if_offscreen|
+  EXPECT_EQ(BubbleBorder::RIGHT_CENTER,
+            frame.bubble_border()->arrow_location());
+
+  // Test bubble not fitting to the left of the anchor.
+  frame.bubble_border()->set_arrow_location(BubbleBorder::RIGHT_CENTER);
+  window_bounds = frame.GetUpdatedWindowBounds(
+      gfx::Rect(100, 300, 50, 50),  // |anchor_rect|
+      gfx::Size(500, 500),          // |client_size|
+      true);                        // |adjust_if_offscreen|
+  EXPECT_EQ(BubbleBorder::LEFT_CENTER, frame.bubble_border()->arrow_location());
+}
+
 // Test that the arrow will not be mirrored when |adjust_if_offscreen| is false.
 TEST_F(BubbleFrameViewTest, GetUpdatedWindowBoundsDontTryMirror) {
   TestBubbleFrameView frame;