Initial patch set to implement improved touch support for screen magnification

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 2218 matching lines @@
      IDS_FLAGS_ENABLE_MIDI_MANAGER_DYNAMIC_INSTANTIATION_NAME,
      IDS_FLAGS_ENABLE_MIDI_MANAGER_DYNAMIC_INSTANTIATION_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(midi::features::kMidiManagerDynamicInstantiation)},
 
 #if defined(OS_WIN)
     {"new-usb-backend", IDS_FLAGS_NEW_USB_BACKEND_NAME,
      IDS_FLAGS_NEW_USB_BACKEND_DESCRIPTION, kOsWin,
      FEATURE_VALUE_TYPE(device::kNewUsbBackend)},
 #endif  // defined(OS_WIN)
 
+#if defined(OS_CHROMEOS)
+    {"enable-touch-support-for-screen-magnifier",
+     IDS_FLAGS_ENABLE_TOUCH_SUPPORT_FOR_SCREEN_MAGNIFIER_NAME,
+     IDS_FLAGS_ENABLE_TOUCH_SUPPORT_FOR_SCREEN_MAGNIFIER_DESCRIPTION, kOsCrOS,
+     SINGLE_VALUE_TYPE(
+         chromeos::switches::kEnableTouchSupportForScreenMagnifier)},
+#endif  // OS_CHROMEOS
+
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 class FlagsStateSingleton {
  public:
   FlagsStateSingleton()
       : flags_state_(kFeatureEntries, arraysize(kFeatureEntries)) {}
   ~FlagsStateSingleton() {}
@@ skipping 188 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags