Adds the option of aligning the launcher to the left or right. There

ui/gfx/monitor.cc

 // Copyright (c) 2012 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/gfx/monitor.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
@@ skipping 40 matching lines @@
       work_area_(bounds),
       device_scale_factor_(GetDefaultDeviceScaleFactor()) {
 #if defined(USE_AURA)
   SetScaleAndBounds(device_scale_factor_, bounds);
 #endif
 }
 
 Monitor::~Monitor() {
 }
 
+Insets Monitor::GetWorkAreaInsets() const {
+  return gfx::Insets(work_area_.y() - bounds_.y(),
+                     work_area_.x() - bounds_.x(),
+                     bounds_.bottom() - work_area_.bottom(),
+                     bounds_.right() - work_area_.right());
+}
+
 void Monitor::SetScaleAndBounds(
     float device_scale_factor,
     const gfx::Rect& bounds_in_pixel) {
   Insets insets = bounds_.InsetsFrom(work_area_);
   device_scale_factor_ = device_scale_factor;
 #if defined(USE_AURA)
   bounds_in_pixel_ = bounds_in_pixel;
 #endif
   // TODO(oshima): For m19, work area/monitor bounds that chrome/webapps sees
   // has (0, 0) origin because it's simpler and enough. Fix this when
@@ skipping 28 matching lines @@
 
 std::string Monitor::ToString() const {
   return base::StringPrintf("Monitor[%d] bounds=%s, workarea=%s, scale=%f",
                             id_,
                             bounds_.ToString().c_str(),
                             work_area_.ToString().c_str(),
                             device_scale_factor_);
 }
 
 }  // namespace gfx