[telemetry] Support absolute paths by changing file:/// to file://. More robust file path handling.

tools/telemetry/telemetry/page/page_runner_unittest.py

Index: tools/telemetry/telemetry/page/page_runner_unittest.py
diff --git a/tools/telemetry/telemetry/page/page_runner_unittest.py b/tools/telemetry/telemetry/page/page_runner_unittest.py
index c3d4f2b820fc7626ebedc95609af09f16c053c6b..cb423bd5ef2198fa6006c79b8b3d461417ebb91e 100644
--- a/tools/telemetry/telemetry/page/page_runner_unittest.py
+++ b/tools/telemetry/telemetry/page/page_runner_unittest.py
@@ -84,9 +84,9 @@ class PageRunnerTests(unittest.TestCase):
     ps = page_set.PageSet()
     expectations = test_expectations.TestExpectations()
     ps.pages.append(page_module.Page(
-        'file:///blank.html', ps, base_dir=util.GetUnittestDataDir()))
+        'file://blank.html', ps, base_dir=util.GetUnittestDataDir()))
     ps.pages.append(page_module.Page(
-        'file:///blank.html', ps, base_dir=util.GetUnittestDataDir()))
+        'file://blank.html', ps, base_dir=util.GetUnittestDataDir()))
 
     class Measurement(page_measurement.PageMeasurement):
       @property
@@ -143,7 +143,7 @@ class PageRunnerTests(unittest.TestCase):
     ps = page_set.PageSet()
     expectations = test_expectations.TestExpectations()
     page = page_module.Page(
-        'file:///blank.html', ps, base_dir=util.GetUnittestDataDir())
+        'file://blank.html', ps, base_dir=util.GetUnittestDataDir())
     page.credentials = "test"
     ps.pages.append(page)
 
@@ -178,7 +178,7 @@ class PageRunnerTests(unittest.TestCase):
     ps = page_set.PageSet()
     expectations = test_expectations.TestExpectations()
     page = page_module.Page(
-        'file:///blank.html', ps, base_dir=util.GetUnittestDataDir())
+        'file://blank.html', ps, base_dir=util.GetUnittestDataDir())
     ps.pages.append(page)
     ps.user_agent_type = 'tablet'
 
@@ -205,7 +205,7 @@ class PageRunnerTests(unittest.TestCase):
     ps = page_set.PageSet()
     expectations = test_expectations.TestExpectations()
     page = page_module.Page(
-        'file:///blank.html', ps, base_dir=util.GetUnittestDataDir())
+        'file://blank.html', ps, base_dir=util.GetUnittestDataDir())
     ps.pages.append(page)
 
     class TestOneTab(page_test.PageTest):
@@ -239,7 +239,7 @@ class PageRunnerTests(unittest.TestCase):
     ps = page_set.PageSet()
     expectations = test_expectations.TestExpectations()
     page = page_module.Page(
-        'file:///blank.html', ps, base_dir=util.GetUnittestDataDir())
+        'file://blank.html', ps, base_dir=util.GetUnittestDataDir())
     ps.pages.append(page)
 
     class TestBeforeLaunch(page_test.PageTest):