chrome: Add out-of-line copy ctors for complex classes.

chrome/browser/devtools/device/android_device_manager.cc

Index: chrome/browser/devtools/device/android_device_manager.cc
diff --git a/chrome/browser/devtools/device/android_device_manager.cc b/chrome/browser/devtools/device/android_device_manager.cc
index 7b647ef81b80d19da8b6797e7cecaa0beac40cc0..ccae719116d1af5d3f3866b88060d84e471ca4d8 100644
--- a/chrome/browser/devtools/device/android_device_manager.cc
+++ b/chrome/browser/devtools/device/android_device_manager.cc
@@ -331,16 +331,24 @@ AndroidDeviceManager::BrowserInfo::BrowserInfo()
     : type(kTypeOther) {
 }
 
+AndroidDeviceManager::BrowserInfo::BrowserInfo(const BrowserInfo& other) =
+    default;
+
 AndroidDeviceManager::DeviceInfo::DeviceInfo()
     : model(kModelOffline), connected(false) {
 }
 
+AndroidDeviceManager::DeviceInfo::DeviceInfo(const DeviceInfo& other) = default;
+
 AndroidDeviceManager::DeviceInfo::~DeviceInfo() {
 }
 
 AndroidDeviceManager::DeviceDescriptor::DeviceDescriptor() {
 }
 
+AndroidDeviceManager::DeviceDescriptor::DeviceDescriptor(
+    const DeviceDescriptor& other) = default;
+
 AndroidDeviceManager::DeviceDescriptor::~DeviceDescriptor() {
 }