[jumbo] move duplicated test code to UnitTestHelpers.cpp

Fixes jumbo builds after https://chromium-review.googlesource.com/c/chromium/src/+/919199

Change-Id: I350604ae19b68859b622568b0d1ac78b223900a5
Reviewed-on: https://chromium-review.googlesource.com/920982Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Cr-Commit-Position: refs/heads/master@{#536971}

third_party/WebKit/Source/core/frame/MHTMLArchiveTest.cpp

@@ -20,31 +20,7 @@
 using blink::URLTestHelpers::ToKURL;
 
 namespace blink {
-
-class LineReader {
- public:
-  LineReader(const std::string& text) : text_(text), index_(0) {}
-  bool GetNextLine(std::string* line) {
-    line->clear();
-    if (index_ >= text_.length())
-      return false;
-
-    size_t end_of_line_index = text_.find("\r\n", index_);
-    if (end_of_line_index == std::string::npos) {
-      *line = text_.substr(index_);
-      index_ = text_.length();
-      return true;
-    }
-
-    *line = text_.substr(index_, end_of_line_index - index_);
-    index_ = end_of_line_index + 2;
-    return true;
-  }
-
- private:
-  std::string text_;
-  size_t index_;
-};
+namespace testing {
 
 class MHTMLArchiveTest : public ::testing::Test {
  public:
@@ -303,4 +279,5 @@ TEST_F(MHTMLArchiveTest, MHTMLFromScheme) {
   EXPECT_NE(nullptr, MHTMLArchive::Create(special_scheme_url, data.get()));
 }
 
+}  // namespace testing
 }  // namespace blink

third_party/WebKit/Source/core/frame/MHTMLLoadingTest.cpp

@@ -26,31 +26,7 @@
 using blink::URLTestHelpers::ToKURL;
 
 namespace blink {
-
-class LineReader {
- public:
-  LineReader(const std::string& text) : text_(text), index_(0) {}
-  bool GetNextLine(std::string* line) {
-    line->clear();
-    if (index_ >= text_.length())
-      return false;
-
-    size_t end_of_line_index = text_.find("\r\n", index_);
-    if (end_of_line_index == std::string::npos) {
-      *line = text_.substr(index_);
-      index_ = text_.length();
-      return true;
-    }
-
-    *line = text_.substr(index_, end_of_line_index - index_);
-    index_ = end_of_line_index + 2;
-    return true;
-  }
-
- private:
-  std::string text_;
-  size_t index_;
-};
+namespace testing {
 
 class MHTMLLoadingTest : public ::testing::Test {
  public:
@@ -249,4 +225,5 @@ TEST_F(MHTMLLoadingTest, LoadMHTMLContainingSoftLineBreaks) {
       "AVeryLongID012345678901234567890123456789012345678901234567890End"));
 }
 
+}  // namespace testing
 }  // namespace blink

third_party/WebKit/Source/platform/testing/UnitTestHelpers.cpp

@@ -112,5 +112,24 @@ scoped_refptr<SharedBuffer> ReadFromFile(const String& path) {
   return SharedBuffer::Create(buffer.data(), buffer.size());
 }
 
+LineReader::LineReader(const std::string& text) : text_(text), index_(0) {}
+
+bool LineReader::GetNextLine(std::string* line) {
+  line->clear();
+  if (index_ >= text_.length())
+    return false;
+
+  size_t end_of_line_index = text_.find("\r\n", index_);
+  if (end_of_line_index == std::string::npos) {
+    *line = text_.substr(index_);
+    index_ = text_.length();
+    return true;
+  }
+
+  *line = text_.substr(index_, end_of_line_index - index_);
+  index_ = end_of_line_index + 2;
+  return true;
+}
+
 }  // namespace testing
 }  // namespace blink

third_party/WebKit/Source/platform/testing/UnitTestHelpers.h

@@ -68,6 +68,16 @@ String PlatformTestDataPath(const String& relative_path = String());
 
 scoped_refptr<SharedBuffer> ReadFromFile(const String& path);
 
+class LineReader {
+ public:
+  LineReader(const std::string& text);
+  bool GetNextLine(std::string* line);
+
+ private:
+  std::string text_;
+  size_t index_;
+};
+
 }  // namespace testing
 }  // namespace blink