update_engine: fixed warnings from cpplint

Fixed all the cpplint warnings in update engine.

BUG=None
TEST=Unit tests still pass.

Change-Id: I285ae858eec8abe0b26ff203b99a42a200ceb71c
Reviewed-on: https://chromium-review.googlesource.com/204027
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/omaha_hash_calculator_unittest.cc b/omaha_hash_calculator_unittest.cc
index 1bd1747..93a7125 100644
--- a/omaha_hash_calculator_unittest.cc
+++ b/omaha_hash_calculator_unittest.cc
@@ -32,7 +32,7 @@
 };
 
 class OmahaHashCalculatorTest : public ::testing::Test {
-public:
+ public:
   const char *kExpectedRawHash;
   const char *kExpectedRawHashEnd;