[telemetry] Expose log file contents in telemetry.internal.browser.Browser

telemetry/telemetry/internal/backends/browser_backend.py

Index: telemetry/telemetry/internal/backends/browser_backend.py
diff --git a/telemetry/telemetry/internal/backends/browser_backend.py b/telemetry/telemetry/internal/backends/browser_backend.py
index 7bdd12b235b6517cf537623d8b4ae0a134cf29e6..ede3495b7f5fe802c31361fdfd8ba0d756ed4f84 100644
--- a/telemetry/telemetry/internal/backends/browser_backend.py
+++ b/telemetry/telemetry/internal/backends/browser_backend.py
@@ -39,6 +39,10 @@ class BrowserBackend(app_backend.AppBackend):
     # Specific browser backend is responsible for overriding this properly.
     raise NotImplementedError
 
+  def GetLogFileContents(self):
+    with file(self.log_file_path) as f:
+      return f.read()
+
   def UploadLogsToCloudStorage(self):
     """ Uploading log files produce by this browser instance to cloud storage.