[polymer] Merge of master into polymer10-migration

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 ede3495b7f5fe802c31361fdfd8ba0d756ed4f84..aca5857e7364fa2510163c4474ca8492aea62a62 100644
--- a/telemetry/telemetry/internal/backends/browser_backend.py
+++ b/telemetry/telemetry/internal/backends/browser_backend.py
@@ -40,6 +40,8 @@ class BrowserBackend(app_backend.AppBackend):
     raise NotImplementedError
 
   def GetLogFileContents(self):
+    if not self.log_file_path:
+      return 'No log file'
     with file(self.log_file_path) as f:
       return f.read()
 
@@ -118,6 +120,18 @@ class BrowserBackend(app_backend.AppBackend):
   def GetStackTrace(self):
     raise NotImplementedError()
 
+  def GetMostRecentMinidumpPath(self):
+    raise NotImplementedError()
+
+  def GetAllMinidumpPaths(self):
+    raise NotImplementedError()
+
+  def GetAllUnsymbolizedMinidumpPaths(self):
+    raise NotImplementedError()
+
+  def SymbolizeMinidump(self, minidump_path):
+    raise NotImplementedError()
+
   def GetSystemInfo(self):
     raise NotImplementedError()