Make callers of CommandLine use it via the base:: namespace.

ui/views/controls/textfield/textfield_unittest.cc

 // 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/views/controls/textfield/textfield.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 1903 matching lines @@
 // Long_Press gesture in Textfield can initiate a drag and drop now.
 TEST_F(TextfieldTest, TestLongPressInitiatesDragDrop) {
   InitTextfield();
   textfield_->SetText(ASCIIToUTF16("Hello string world"));
 
   // Ensure the textfield will provide selected text for drag data.
   textfield_->SelectRange(gfx::Range(6, 12));
   const gfx::Point kStringPoint(GetCursorPositionX(9), 0);
 
   // Enable touch-drag-drop to make long press effective.
-  CommandLine::ForCurrentProcess()->AppendSwitch(
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableTouchDragDrop);
 
   // Create a long press event in the selected region should start a drag.
   GestureEventForTest long_press(
       kStringPoint.x(),
       kStringPoint.y(),
       ui::GestureEventDetails(ui::ET_GESTURE_LONG_PRESS));
   textfield_->OnGestureEvent(&long_press);
   EXPECT_TRUE(textfield_->CanStartDragForView(NULL, kStringPoint,
                                               kStringPoint));
@@ skipping 26 matching lines @@
   SendKeyEvent('X');
 
   EXPECT_FALSE(controller.target());
 }
 
 class TextfieldTouchSelectionTest : public TextfieldTest {
  public:
   // TextfieldTest:
   void SetUp() override {
     TextfieldTest::SetUp();
-    CommandLine::ForCurrentProcess()->AppendSwitch(
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnableTouchEditing);
   }
 
  protected:
   // Simulates a complete tap.
   void Tap(const gfx::Point& point) {
     GestureEventForTest begin(
         point.x(), point.y(), ui::GestureEventDetails(ui::ET_GESTURE_BEGIN));
     textfield_->OnGestureEvent(&begin);
 
@@ skipping 53 matching lines @@
   ASSERT_TRUE(switches::IsTouchDragDropEnabled());
   GestureEventForTest long_press_2(
       x, 0, ui::GestureEventDetails(ui::ET_GESTURE_LONG_PRESS));
   textfield_->OnGestureEvent(&long_press_2);
   EXPECT_STR_EQ("hello", textfield_->GetSelectedText());
   EXPECT_FALSE(test_api_->touch_selection_controller());
   EXPECT_FALSE(long_press_2.handled());
 
   // After disabling touch drag drop, long pressing again in the selection
   // region should not do anything.
-  CommandLine::ForCurrentProcess()->AppendSwitch(
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kDisableTouchDragDrop);
   ASSERT_FALSE(switches::IsTouchDragDropEnabled());
   GestureEventForTest long_press_3(
       x, 0, ui::GestureEventDetails(ui::ET_GESTURE_LONG_PRESS));
   textfield_->OnGestureEvent(&long_press_3);
   EXPECT_STR_EQ("hello", textfield_->GetSelectedText());
   EXPECT_FALSE(test_api_->touch_selection_controller());
   EXPECT_FALSE(long_press_3.handled());
 }
 #endif
@@ skipping 45 matching lines @@
 
   // Tap again on selection and check if touch selection handles are still
   // present and selection is changed to a cursor at tap location.
   Tap(tap_point);
   textfield_->GetSelectionRange(&range);
   EXPECT_TRUE(test_api_->touch_selection_controller());
   EXPECT_EQ(tap_range, range);
 }
 
 }  // namespace views