Reformat the WebRTC code base

Running clang-format with chromium's style guide.

The goal is n-fold:
 * providing consistency and readability (that's what code guidelines are for)
 * preventing noise with presubmit checks and git cl format
 * building on the previous point: making it easier to automatically fix format issues
 * you name it

Please consider using git-hyper-blame to ignore this commit.

Bug: webrtc:9340
Change-Id: I694567c4cdf8cee2860958cfe82bfaf25848bb87
Reviewed-on: https://webrtc-review.googlesource.com/81185
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23660}

sdk/objc/Framework/Classes/Common/NSString+StdString.h

@@ -19,7 +19,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property(nonatomic, readonly) std::string stdString;
 
 + (std::string)stdStringForString:(NSString *)nsString;
-+ (NSString *)stringForStdString:(const std::string&)stdString;
++ (NSString *)stringForStdString:(const std::string &)stdString;
 
 @end
 

sdk/objc/Framework/Classes/Common/helpers.h

@@ -18,7 +18,7 @@ namespace ios {
 
 bool CheckAndLogError(BOOL success, NSError* error);
 
-NSString *NSStringFromStdString(const std::string& stdString);
+NSString* NSStringFromStdString(const std::string& stdString);
 std::string StdStringFromNSString(NSString* nsString);
 
 // Return thread ID as a string.