aura: Fix NativeViewHostAura non fast resize clipping.

ui/views/controls/native/native_view_host_aura_unittest.cc

Index: ui/views/controls/native/native_view_host_aura_unittest.cc
diff --git a/ui/views/controls/native/native_view_host_aura_unittest.cc b/ui/views/controls/native/native_view_host_aura_unittest.cc
index 6dc43750ebd36a4699ee6637ccb5eba35f281a7d..05e2e7fc6df12398e330957355b4ad5b337a1968 100644
--- a/ui/views/controls/native/native_view_host_aura_unittest.cc
+++ b/ui/views/controls/native/native_view_host_aura_unittest.cc
@@ -228,4 +228,47 @@ TEST_F(NativeViewHostAuraTest, DestroyWidget) {
   EXPECT_EQ(1, NativeViewHostTesting::destroyed_count());
 }
 
+// Test that the none fast resize path is clipped and positioned correctly.
+TEST_F(NativeViewHostAuraTest, NonFastResizePath) {
+  const gfx::Rect base_rect = gfx::Rect(0, 0, 100, 100);
+  CreateHost();
+  toplevel()->SetBounds(base_rect);
+  native_host()->ShowWidget(base_rect.x(), base_rect.y(),
+                            base_rect.width(), base_rect.height());
+  EXPECT_EQ(base_rect.ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(base_rect.ToString(),
+            clipping_window()->bounds().ToString());
+
+  const gfx::Rect kTestCases[] = {
+    gfx::Rect(-10, -20, 100, 100),
+    gfx::Rect(0, -20, 100, 100),
+    gfx::Rect(10, -20, 100, 100),
+    gfx::Rect(-10, 0, 100, 100),
+    gfx::Rect(0, 0, 100, 100),
+    gfx::Rect(10, 0, 100, 100),
+    gfx::Rect(-10, 20, 100, 100),
+    gfx::Rect(0, 20, 100, 100),
+    gfx::Rect(10, 20, 100, 100),
+    gfx::Rect(0, 0, 200, 300),
+    gfx::Rect(-50, -100, 200, 300),
+  };
+
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTestCases); ++i) {
+    const gfx::Rect& bounds = kTestCases[i];
+
+    host()->SetBoundsRect(bounds);
+
+    gfx::Rect clip_rect = gfx::IntersectRects(bounds, base_rect);
+    EXPECT_EQ(clip_rect.ToString(), clipping_window()->bounds().ToString());
+
+    gfx::Rect native_view_bounds = bounds;
+    native_view_bounds.Offset(-clip_rect.x(), -clip_rect.y());
+    EXPECT_EQ(native_view_bounds.ToString(),
+              host()->native_view()->bounds().ToString());
+  }
+
+  DestroyHost();
+}
+
 }  // namespace views