Namespace Log.h/cpp in dawn::

The LogMessage::LogMessage constructor was redefining a symbol that
exists in re2 inside of Chromium. So we namespace Log inside dawn:: to
avoid the conflict.

BUG=dawn:302

Change-Id: Ida349208e2c6fe9ac032e1bd8cd442dff0b3f6bc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14320
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>

src/common/Log.cpp

@@ -23,90 +23,94 @@
 #    include <android/log.h>
 #endif
 
-namespace {
+namespace dawn {
 
-    const char* SeverityName(LogSeverity severity) {
-        switch (severity) {
-            case LogSeverity::Debug:
-                return "Debug";
-            case LogSeverity::Info:
-                return "Info";
-            case LogSeverity::Warning:
-                return "Warning";
-            case LogSeverity::Error:
-                return "Error";
-            default:
-                UNREACHABLE();
-                return "";
+    namespace {
+
+        const char* SeverityName(LogSeverity severity) {
+            switch (severity) {
+                case LogSeverity::Debug:
+                    return "Debug";
+                case LogSeverity::Info:
+                    return "Info";
+                case LogSeverity::Warning:
+                    return "Warning";
+                case LogSeverity::Error:
+                    return "Error";
+                default:
+                    UNREACHABLE();
+                    return "";
+            }
         }
-    }
 
 #if defined(DAWN_PLATFORM_ANDROID)
-    android_LogPriority AndroidLogPriority(LogSeverity severity) {
-        switch (severity) {
-            case LogSeverity::Debug:
-                return ANDROID_LOG_INFO;
-            case LogSeverity::Info:
-                return ANDROID_LOG_INFO;
-            case LogSeverity::Warning:
-                return ANDROID_LOG_WARN;
-            case LogSeverity::Error:
-                return ANDROID_LOG_ERROR;
-            default:
-                UNREACHABLE();
-                return ANDROID_LOG_ERROR;
+        android_LogPriority AndroidLogPriority(LogSeverity severity) {
+            switch (severity) {
+                case LogSeverity::Debug:
+                    return ANDROID_LOG_INFO;
+                case LogSeverity::Info:
+                    return ANDROID_LOG_INFO;
+                case LogSeverity::Warning:
+                    return ANDROID_LOG_WARN;
+                case LogSeverity::Error:
+                    return ANDROID_LOG_ERROR;
+                default:
+                    UNREACHABLE();
+                    return ANDROID_LOG_ERROR;
+            }
         }
-    }
 #endif  // defined(DAWN_PLATFORM_ANDROID)
 
-}  // anonymous namespace
+    }  // anonymous namespace
 
-LogMessage::LogMessage(LogSeverity severity) : mSeverity(severity) {
-}
-
-LogMessage::~LogMessage() {
-    std::string fullMessage = mStream.str();
-
-    // If this message has been moved, its stream is empty.
-    if (fullMessage.empty()) {
-        return;
+    LogMessage::LogMessage(LogSeverity severity) : mSeverity(severity) {
     }
 
-    const char* severityName = SeverityName(mSeverity);
+    LogMessage::~LogMessage() {
+        std::string fullMessage = mStream.str();
 
-    FILE* outputStream = stdout;
-    if (mSeverity == LogSeverity::Warning || mSeverity == LogSeverity::Error) {
-        outputStream = stderr;
-    }
+        // If this message has been moved, its stream is empty.
+        if (fullMessage.empty()) {
+            return;
+        }
+
+        const char* severityName = SeverityName(mSeverity);
+
+        FILE* outputStream = stdout;
+        if (mSeverity == LogSeverity::Warning || mSeverity == LogSeverity::Error) {
+            outputStream = stderr;
+        }
 
 #if defined(DAWN_PLATFORM_ANDROID)
-    android_LogPriority androidPriority = AndroidLogPriority(mSeverity);
-    __android_log_print(androidPriority, "Dawn", "%s: %s\n", severityName, fullMessage.c_str());
+        android_LogPriority androidPriority = AndroidLogPriority(mSeverity);
+        __android_log_print(androidPriority, "Dawn", "%s: %s\n", severityName, fullMessage.c_str());
 #else   // defined(DAWN_PLATFORM_ANDROID)
-    // Note: we use fprintf because <iostream> includes static initializers.
-    fprintf(outputStream, "%s: %s\n", severityName, fullMessage.c_str());
-    fflush(outputStream);
+        // Note: we use fprintf because <iostream> includes static initializers.
+        fprintf(outputStream, "%s: %s\n", severityName, fullMessage.c_str());
+        fflush(outputStream);
 #endif  // defined(DAWN_PLATFORM_ANDROID)
-}
+    }
 
-LogMessage DebugLog() {
-    return {LogSeverity::Debug};
-}
+    LogMessage DebugLog() {
+        return {LogSeverity::Debug};
+    }
 
-LogMessage InfoLog() {
-    return {LogSeverity::Info};
-}
+    LogMessage InfoLog() {
+        return {LogSeverity::Info};
+    }
 
-LogMessage WarningLog() {
-    return {LogSeverity::Warning};
-}
+    LogMessage WarningLog() {
+        return {LogSeverity::Warning};
+    }
 
-LogMessage ErrorLog() {
-    return {LogSeverity::Error};
-}
+    LogMessage ErrorLog() {
+        return {LogSeverity::Error};
+    }
 
-LogMessage DebugLog(const char* file, const char* function, int line) {
-    LogMessage message = DebugLog();
-    message << file << ":" << line << "(" << function << ")";
-    return message;
-}
+    LogMessage DebugLog(const char* file, const char* function, int line) {
+        LogMessage message = DebugLog();
+        message << file << ":" << line << "(" << function << ")";
+        return message;
+    }
+
+}  // namespace dawn