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

Source/core/editing/SurroundingTextTest.cpp

Index: Source/core/editing/SurroundingTextTest.cpp
diff --git a/Source/core/editing/SurroundingTextTest.cpp b/Source/core/editing/SurroundingTextTest.cpp
index 69b71d05ae25596467ffc90057c4d458604bc2aa..052cdfc4a7a09456880bab79e4ecc5e0f7ae0233 100644
--- a/Source/core/editing/SurroundingTextTest.cpp
+++ b/Source/core/editing/SurroundingTextTest.cpp
@@ -116,7 +116,7 @@ TEST_F(SurroundingTextTest, BasicRangeSelection)
 
     {
         VisibleSelection selection = select(0, 5);
-        SurroundingText surroundingText(*selection.firstRange(), 1);
+        SurroundingText surroundingText(*firstRangeOf(selection), 1);
 
         EXPECT_EQ("Lorem ", surroundingText.content());
         EXPECT_EQ(0u, surroundingText.startOffsetInContent());
@@ -125,7 +125,7 @@ TEST_F(SurroundingTextTest, BasicRangeSelection)
 
     {
         VisibleSelection selection = select(0, 5);
-        SurroundingText surroundingText(*selection.firstRange(), 5);
+        SurroundingText surroundingText(*firstRangeOf(selection), 5);
 
         EXPECT_EQ("Lorem ip", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(1u, surroundingText.startOffsetInContent());
@@ -134,7 +134,7 @@ TEST_F(SurroundingTextTest, BasicRangeSelection)
 
     {
         VisibleSelection selection = select(0, 5);
-        SurroundingText surroundingText(*selection.firstRange(), 42);
+        SurroundingText surroundingText(*firstRangeOf(selection), 42);
 
         EXPECT_EQ("Lorem ipsum dolor sit amet", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(1u, surroundingText.startOffsetInContent());
@@ -143,7 +143,7 @@ TEST_F(SurroundingTextTest, BasicRangeSelection)
 
     {
         VisibleSelection selection = select(6, 11);
-        SurroundingText surroundingText(*selection.firstRange(), 2);
+        SurroundingText surroundingText(*firstRangeOf(selection), 2);
 
         EXPECT_EQ(" ipsum ", surroundingText.content());
         EXPECT_EQ(1u, surroundingText.startOffsetInContent());
@@ -152,7 +152,7 @@ TEST_F(SurroundingTextTest, BasicRangeSelection)
 
     {
         VisibleSelection selection = select(6, 11);
-        SurroundingText surroundingText(*selection.firstRange(), 42);
+        SurroundingText surroundingText(*firstRangeOf(selection), 42);
 
         EXPECT_EQ("Lorem ipsum dolor sit amet", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(7u, surroundingText.startOffsetInContent());
@@ -216,7 +216,7 @@ TEST_F(SurroundingTextTest, TreeRangeSelection)
 
     {
         VisibleSelection selection = select(0, 1);
-        SurroundingText surroundingText(*selection.firstRange(), 1);
+        SurroundingText surroundingText(*firstRangeOf(selection), 1);
 
         EXPECT_EQ("fo", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(0u, surroundingText.startOffsetInContent());
@@ -225,7 +225,7 @@ TEST_F(SurroundingTextTest, TreeRangeSelection)
 
     {
         VisibleSelection selection = select(0, 3);
-        SurroundingText surroundingText(*selection.firstRange(), 12);
+        SurroundingText surroundingText(*firstRangeOf(selection), 12);
 
         EXPECT_EQ("e of foo bar", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(5u, surroundingText.startOffsetInContent());
@@ -234,7 +234,7 @@ TEST_F(SurroundingTextTest, TreeRangeSelection)
 
     {
         VisibleSelection selection = select(0, 3);
-        SurroundingText surroundingText(*selection.firstRange(), 1337);
+        SurroundingText surroundingText(*firstRangeOf(selection), 1337);
 
         EXPECT_EQ("This is outside of foo bar the selected node", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(20u, surroundingText.startOffsetInContent());
@@ -243,7 +243,7 @@ TEST_F(SurroundingTextTest, TreeRangeSelection)
 
     {
         VisibleSelection selection = select(4, 7);
-        SurroundingText surroundingText(*selection.firstRange(), 12);
+        SurroundingText surroundingText(*firstRangeOf(selection), 12);
 
         EXPECT_EQ("foo bar the se", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(5u, surroundingText.startOffsetInContent());
@@ -252,7 +252,7 @@ TEST_F(SurroundingTextTest, TreeRangeSelection)
 
     {
         VisibleSelection selection = select(0, 7);
-        SurroundingText surroundingText(*selection.firstRange(), 1337);
+        SurroundingText surroundingText(*firstRangeOf(selection), 1337);
 
         EXPECT_EQ("This is outside of foo bar the selected node", surroundingText.content().simplifyWhiteSpace());
         EXPECT_EQ(20u, surroundingText.startOffsetInContent());