clang/win: Let some chromium_code targets build with -Wextra.

sandbox/win/src/interception_unittest.cc

Index: sandbox/win/src/interception_unittest.cc
diff --git a/sandbox/win/src/interception_unittest.cc b/sandbox/win/src/interception_unittest.cc
index 7ce5724bdc5e83542abc5499df3a7a09b30bdd7f..891c353385c3f2e62f1389e6b6afb690894f55d6 100644
--- a/sandbox/win/src/interception_unittest.cc
+++ b/sandbox/win/src/interception_unittest.cc
@@ -118,7 +118,7 @@ TEST(InterceptionManagerTest, GetGranularAlignedRandomOffset) {
     max_val = std::max(val, max_val);
   }
   ASSERT_EQ(max_val, kAllocGranularity - kAlignment);
-  ASSERT_EQ(min_val, 0);
+  ASSERT_EQ(0u, min_val);
   ASSERT_EQ(min_nonzero_val, kAlignment);
 }
 
@@ -179,7 +179,7 @@ TEST(InterceptionManagerTest, BufferLayout1) {
                                       INTERCEPTION_EAT, function, OPEN_KEY_ID);
 
   // Verify that all interceptions were added
-  ASSERT_EQ(18, interceptions.interceptions_.size());
+  ASSERT_EQ(18u, interceptions.interceptions_.size());
 
   size_t buffer_size = interceptions.GetBufferSize();
   scoped_ptr<BYTE[]> local_buffer(new BYTE[buffer_size]);
@@ -195,7 +195,7 @@ TEST(InterceptionManagerTest, BufferLayout1) {
   // first group remains on the list of interceptions (inside the object
   // "interceptions"). There are 3 local interceptions (of ntdll); the
   // other 15 have to be sent to the child to be performed "hot".
-  EXPECT_EQ(3, interceptions.interceptions_.size());
+  EXPECT_EQ(3u, interceptions.interceptions_.size());
 
   int num_dlls, num_functions, num_names;
   WalkBuffer(local_buffer.get(), buffer_size, &num_dlls, &num_functions,
@@ -232,7 +232,7 @@ TEST(InterceptionManagerTest, BufferLayout2) {
                                       INTERCEPTION_SMART_SIDESTEP, function,
                                       OPEN_FILE_ID);
   // Verify that all interceptions were added
-  ASSERT_EQ(5, interceptions.interceptions_.size());
+  ASSERT_EQ(5u, interceptions.interceptions_.size());
 
   size_t buffer_size = interceptions.GetBufferSize();
   scoped_ptr<BYTE[]> local_buffer(new BYTE[buffer_size]);
@@ -245,7 +245,7 @@ TEST(InterceptionManagerTest, BufferLayout2) {
   // group with the interceptions belonging to dlls that will be "hot"
   // patched on the client. The second group lives on local_buffer, and the
   // first group remains on the list of interceptions, in this case just one.
-  EXPECT_EQ(1, interceptions.interceptions_.size());
+  EXPECT_EQ(1u, interceptions.interceptions_.size());
 
   int num_dlls, num_functions, num_names;
   WalkBuffer(local_buffer.get(), buffer_size, &num_dlls, &num_functions,