Reland: Move TouchSelectionController from content to ui

This patch is only moving new unified touch selection files from
content/ to ui/touch_selection/. This is the first step to allow Aura
use the new unified TouchSelectionController.

The only change to TouchSelectionController needed for this move is
replacing use of cc::ViewportSelectionBound with ui::SelectionBound.

The actual use of the new touch selection for Aura will happen in future
CL(s). After that, we can remove current touch selection code from
ui/base/touch/.

BUG=399721

Committed: https://crrev.com/29fd405ca491a6fcf0dde6277d92d44300cb2926
Cr-Commit-Position: refs/heads/master@{#307336}

Review URL: https://codereview.chromium.org/759433002

Cr-Commit-Position: refs/heads/master@{#307514}
diff --git a/ui/base/touch/selection_bound_unittest.cc b/ui/base/touch/selection_bound_unittest.cc
new file mode 100644
index 0000000..363338d
--- /dev/null
+++ b/ui/base/touch/selection_bound_unittest.cc
@@ -0,0 +1,90 @@
+// Copyright 2014 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.
+
+#include "ui/base/touch/selection_bound.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/rect.h"
+
+namespace ui {
+
+TEST(SelectionBoundTest, RectBetweenSelectionBounds) {
+  SelectionBound b1, b2;
+  // Simple case of aligned vertical bounds of equal height
+  b1.SetEdge(gfx::Point(0, 20), gfx::Point(0, 25));
+  b2.SetEdge(gfx::Point(110, 20), gfx::Point(110, 25));
+  gfx::Rect expected_rect(
+      b1.edge_top_rounded().x(),
+      b1.edge_top_rounded().y(),
+      b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
+      b2.edge_bottom_rounded().y() - b2.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+
+  // Parallel vertical bounds of different heights
+  b1.SetEdge(gfx::Point(10, 20), gfx::Point(10, 25));
+  b2.SetEdge(gfx::Point(110, 0), gfx::Point(110, 35));
+  expected_rect = gfx::Rect(
+      b1.edge_top_rounded().x(),
+      b2.edge_top_rounded().y(),
+      b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
+      b2.edge_bottom_rounded().y() - b2.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+
+  b1.SetEdge(gfx::Point(10, 20), gfx::Point(10, 30));
+  b2.SetEdge(gfx::Point(110, 25), gfx::Point(110, 45));
+  expected_rect = gfx::Rect(
+      b1.edge_top_rounded().x(),
+      b1.edge_top_rounded().y(),
+      b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
+      b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+
+  b1.SetEdge(gfx::Point(10, 20), gfx::Point(10, 30));
+  b2.SetEdge(gfx::Point(110, 40), gfx::Point(110, 60));
+  expected_rect = gfx::Rect(
+      b1.edge_top_rounded().x(),
+      b1.edge_top_rounded().y(),
+      b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
+      b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+
+  // Overlapping vertical bounds
+  b1.SetEdge(gfx::Point(10, 20), gfx::Point(10, 30));
+  b2.SetEdge(gfx::Point(10, 25), gfx::Point(10, 40));
+  expected_rect = gfx::Rect(
+      b1.edge_top_rounded().x(),
+      b1.edge_top_rounded().y(),
+      0,
+      b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+
+  // Non-vertical bounds: "\ \"
+  b1.SetEdge(gfx::Point(10, 20), gfx::Point(20, 30));
+  b2.SetEdge(gfx::Point(110, 40), gfx::Point(120, 60));
+  expected_rect = gfx::Rect(
+      b1.edge_top_rounded().x(),
+      b1.edge_top_rounded().y(),
+      b2.edge_bottom_rounded().x() - b1.edge_top_rounded().x(),
+      b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+
+  // Non-vertical bounds: "/ \"
+  b1.SetEdge(gfx::Point(20, 30), gfx::Point(0, 40));
+  b2.SetEdge(gfx::Point(110, 30), gfx::Point(120, 40));
+  expected_rect = gfx::Rect(
+      b1.edge_bottom_rounded().x(),
+      b1.edge_top_rounded().y(),
+      b2.edge_bottom_rounded().x() - b1.edge_bottom_rounded().x(),
+      b2.edge_bottom_rounded().y() - b2.edge_top_rounded().y());
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
+  EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
+}
+
+}  // namespace ui