Reformat existing code. There should be no functional effects.

This includes changes like:
* Attempt to break lines at better positions
* Use "override" in more places, don't use "virtual" with it
* Use {} where the body is more than one line
* Make declaration and definition arg names match
* Eliminate unused code
* EXPECT_EQ(expected, actual) (but use (actual, expected) for e.g. _GT)
* Correct #include order
* Use anonymous namespaces in preference to "static" for file-scoping
* Eliminate unnecessary casts
* Update reference code in comments of ARM assembly sources to match actual current C code
* Fix indenting to be more style-guide compliant
* Use arraysize() in more places
* Use bool instead of int for "boolean" values (0/1)
* Shorten and simplify code
* Spaces around operators
* 80 column limit
* Use const more consistently
* Space goes after '*' in type name, not before
* Remove unnecessary return values
* Use "(var == const)", not "(const == var)"
* Spelling
* Prefer true, typed constants to "enum hack" constants
* Avoid "virtual" on non-overridden functions
* ASSERT(x == y) -> ASSERT_EQ(y, x)

BUG=none
R=andrew@webrtc.org, asapersson@webrtc.org, henrika@webrtc.org, juberti@webrtc.org, kjellander@webrtc.org, kwiberg@webrtc.org

Review URL: https://codereview.webrtc.org/1172163004

Cr-Commit-Position: refs/heads/master@{#9420}

webrtc/common_audio/signal_processing/signal_processing_unittest.cc

@@ -495,10 +495,11 @@ TEST_F(SplTest, AutoCorrelationTest) {
   const int32_t expected[kVector16Size] = {302681398, 14223410, -121705063,
     -85221647, -17104971, 61806945, 6644603, -669329, 43};
 
-  EXPECT_EQ(-1, WebRtcSpl_AutoCorrelation(vector16,
-      kVector16Size, kVector16Size + 1, vector32, &scale));
-  EXPECT_EQ(kVector16Size, WebRtcSpl_AutoCorrelation(vector16,
-      kVector16Size, kVector16Size - 1, vector32, &scale));
+  EXPECT_EQ(-1, WebRtcSpl_AutoCorrelation(vector16, kVector16Size,
+                                          kVector16Size + 1, vector32, &scale));
+  EXPECT_EQ(kVector16Size,
+            WebRtcSpl_AutoCorrelation(vector16, kVector16Size,
+                                      kVector16Size - 1, vector32, &scale));
   EXPECT_EQ(3, scale);
   for (int i = 0; i < kVector16Size; ++i) {
     EXPECT_EQ(expected[i], vector32[i]);