Reland change for aura tooltips that was revert due to build break:

ui/views/widget/tooltip_manager_aura.cc

Index: ui/views/widget/tooltip_manager_aura.cc
diff --git a/ui/views/widget/tooltip_manager_aura.cc b/ui/views/widget/tooltip_manager_aura.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0847ed3fa6b2f1feab811ae0cec2a09b3ba81288
--- /dev/null
+++ b/ui/views/widget/tooltip_manager_aura.cc
@@ -0,0 +1,107 @@
+// Copyright (c) 2011 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 "base/logging.h"
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/client/tooltip_client.h"
+#include "ui/aura/desktop.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/font.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/screen.h"
+#include "ui/views/widget/native_widget_aura.h"
+#include "ui/views/widget/tooltip_manager_aura.h"
+
+namespace views {
+
+// static
+int TooltipManager::GetTooltipHeight() {
+  // Not used for linux and chromeos.
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+// static
+gfx::Font TooltipManager::GetDefaultFont() {
+  return aura::TooltipClient::GetDefaultFont();
+}
+
+// static
+int TooltipManager::GetMaxWidth(int x, int y) {
+  return aura::TooltipClient::GetMaxWidth(x, y);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TooltipManagerAura public:
+
+TooltipManagerAura::TooltipManagerAura(NativeWidgetAura* native_widget_aura)
+    : native_widget_aura_(native_widget_aura) {
+  native_widget_aura_->GetNativeView()->SetProperty(aura::kTooltipTextKey,
+      &tooltip_text_);
+}
+
+TooltipManagerAura::~TooltipManagerAura() {
+  native_widget_aura_->GetNativeView()->SetProperty(aura::kTooltipTextKey,
+      NULL);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TooltipManagerAura, TooltipManager implementation:
+
+void TooltipManagerAura::UpdateTooltip() {
+  void* property = aura::Desktop::GetInstance()->GetProperty(
+      aura::kDesktopTooltipClientKey);
+  if (property) {
+    gfx::Point view_point = aura::Desktop::GetInstance()->last_mouse_location();
+    aura::Window::ConvertPointToWindow(aura::Desktop::GetInstance(),
+        native_widget_aura_->GetNativeView(), &view_point);
+    View* view = GetViewUnderPoint(view_point);
+    if (view) {
+      View::ConvertPointFromWidget(view, &view_point);
+      if (!view->GetTooltipText(view_point, &tooltip_text_))
+          tooltip_text_.clear();
+    } else {
+      tooltip_text_.clear();
+    }
+    aura::TooltipClient* tc = static_cast<aura::TooltipClient*>(property);
+    tc->UpdateTooltip(native_widget_aura_->GetNativeView());
+  }
+}
+
+void TooltipManagerAura::TooltipTextChanged(View* view)  {
+  void* property = aura::Desktop::GetInstance()->GetProperty(
+      aura::kDesktopTooltipClientKey);
+  if (property) {
+    gfx::Point view_point = aura::Desktop::GetInstance()->last_mouse_location();
+    aura::Window::ConvertPointToWindow(aura::Desktop::GetInstance(),
+        native_widget_aura_->GetNativeView(), &view_point);
+    View* target = GetViewUnderPoint(view_point);
+    if (target != view)
+      return;
+    if (target) {
+      View::ConvertPointFromWidget(view, &view_point);
+      if (!view->GetTooltipText(view_point, &tooltip_text_))
+          tooltip_text_.clear();
+    } else {
+      tooltip_text_.clear();
+    }
+    aura::TooltipClient* tc = static_cast<aura::TooltipClient*>(property);
+    tc->UpdateTooltip(native_widget_aura_->GetNativeView());
+  }
+}
+
+void TooltipManagerAura::ShowKeyboardTooltip(View* view) {
+  NOTREACHED();
+}
+
+void TooltipManagerAura::HideKeyboardTooltip()  {
+  NOTREACHED();
+}
+
+View* TooltipManagerAura::GetViewUnderPoint(const gfx::Point& point) {
+  View* root_view = native_widget_aura_->GetWidget()->GetRootView();
+  return root_view->GetEventHandlerForPoint(point);
+}
+
+}  // namespace views.