[jumbo] avoid helper function collisions in VisibleUnits*Test.cpp

This fixes jumbo builds after https://chromium-review.googlesource.com/923604

Change-Id: Ib7030da7e0a6acfdad8200564f9375ba218e8ca6
Reviewed-on: https://chromium-review.googlesource.com/923723Reviewed-by: Fredrik Söderquist <fs@opera.com>
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Cr-Commit-Position: refs/heads/master@{#537278}

third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp

@@ -13,8 +13,7 @@
 #include "core/layout/LayoutTextFragment.h"
 
 namespace blink {
-
-namespace {
+namespace visible_units_test {
 
 PositionWithAffinity PositionWithAffinityInDOMTree(
     Node& anchor,
@@ -46,8 +45,6 @@ VisiblePositionInFlatTree CreateVisiblePositionInFlatTree(
   return CreateVisiblePosition(PositionInFlatTree(&anchor, offset), affinity);
 }
 
-}  // namespace
-
 class VisibleUnitsTest : public EditingTestBase {};
 
 TEST_F(VisibleUnitsTest, absoluteCaretBoundsOf) {
@@ -1680,4 +1677,5 @@ TEST_F(VisibleUnitsTest, NextBoundaryOfEditableTableWithLeadingSpaceInOutput) {
             GetCaretTextFromBody(result));
 }
 
+}  // namespace visible_units_test
 }  // namespace blink

third_party/WebKit/Source/core/editing/VisibleUnitsWordTest.cpp

@@ -9,8 +9,7 @@
 #include "core/editing/testing/EditingTestBase.h"
 
 namespace blink {
-
-namespace {
+namespace visible_units_word_test {
 
 VisiblePosition CreateVisiblePositionInDOMTree(
     Node& anchor,
@@ -26,8 +25,6 @@ VisiblePositionInFlatTree CreateVisiblePositionInFlatTree(
   return CreateVisiblePosition(PositionInFlatTree(&anchor, offset), affinity);
 }
 
-}  // namespace
-
 class VisibleUnitsWordTest : public EditingTestBase {
  protected:
   std::string DoStartOfWord(
@@ -435,4 +432,5 @@ TEST_F(VisibleUnitsWordTest, NextWordSkipTab) {
   EXPECT_EQ("<p><s>\t</s>foo|</p>", DoNextWord("<p><s>\t|</s>foo</p>"));
 }
 
+}  // namespace visible_units_word_test
 }  // namespace blink