Introduce firstRangeOf() as replacement of VisibleSelection::firstRange()

Source/core/editing/VisibleSelectionTest.cpp

 // 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 "config.h"
 #include "core/editing/VisibleSelection.h"
 
 #include "core/dom/Range.h"
 #include "core/editing/EditingTestBase.h"
 
@@ skipping 43 matching lines @@
 TEST_F(VisibleSelectionTest, Initialisation)
 {
     setBodyContent(LOREM_IPSUM);
 
     VisibleSelection selection;
     setSelection(selection, 0);
 
     EXPECT_FALSE(selection.isNone());
     EXPECT_TRUE(selection.isCaret());
 
-    RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+    RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
     EXPECT_EQ(0, range->startOffset());
     EXPECT_EQ(0, range->endOffset());
     EXPECT_EQ("", range->text());
     testComposedTreePositionsToEqualToDOMTreePositions(selection);
 }
 
 TEST_F(VisibleSelectionTest, ShadowCrossing)
 {
     const char* bodyContent = "<p id='host'>00<b id='one'>11</b><b id='two'>22</b>33</p>";
     const char* shadowContent = "<a><span id='s4'>44</span><content select=#two></content><span id='s5'>55</span><content select=#one></content><span id='s6'>66</span></a>";
@@ skipping 59 matching lines @@
 {
     setBodyContent(LOREM_IPSUM);
 
     VisibleSelection selection;
 
     // Beginning of a word.
     {
         setSelection(selection, 0);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(0, range->startOffset());
         EXPECT_EQ(5, range->endOffset());
         EXPECT_EQ("Lorem", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
 
     }
 
     // Middle of a word.
     {
         setSelection(selection, 8);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(6, range->startOffset());
         EXPECT_EQ(11, range->endOffset());
         EXPECT_EQ("ipsum", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
 
     }
 
     // End of a word.
     // FIXME: that sounds buggy, we might want to select the word _before_ instead
     // of the space...
     {
         setSelection(selection, 5);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(5, range->startOffset());
         EXPECT_EQ(6, range->endOffset());
         EXPECT_EQ(" ", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
     }
 
     // Before comma.
     // FIXME: that sounds buggy, we might want to select the word _before_ instead
     // of the comma.
     {
         setSelection(selection, 26);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(26, range->startOffset());
         EXPECT_EQ(27, range->endOffset());
         EXPECT_EQ(",", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
     }
 
     // After comma.
     {
         setSelection(selection, 27);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(27, range->startOffset());
         EXPECT_EQ(28, range->endOffset());
         EXPECT_EQ(" ", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
     }
 
     // When selecting part of a word.
     {
         setSelection(selection, 0, 1);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(0, range->startOffset());
         EXPECT_EQ(5, range->endOffset());
         EXPECT_EQ("Lorem", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
     }
 
     // When selecting part of two words.
     {
         setSelection(selection, 2, 8);
         selection.expandUsingGranularity(WordGranularity);
 
-        RefPtrWillBeRawPtr<Range> range = selection.firstRange();
+        RefPtrWillBeRawPtr<Range> range = firstRangeOf(selection);
         EXPECT_EQ(0, range->startOffset());
         EXPECT_EQ(11, range->endOffset());
         EXPECT_EQ("Lorem ipsum", range->text());
         testComposedTreePositionsToEqualToDOMTreePositions(selection);
     }
 }
 
 } // namespace blink