[Android] Support startup histogram.

chrome/app/chrome_main_delegate.cc

Index: chrome/app/chrome_main_delegate.cc
diff --git a/chrome/app/chrome_main_delegate.cc b/chrome/app/chrome_main_delegate.cc
index bdab589108971e448cbdd9053a0420ed28be536e..cc0c1b1c21bb43506d607a7eff4eb0d75aafe36d 100644
--- a/chrome/app/chrome_main_delegate.cc
+++ b/chrome/app/chrome_main_delegate.cc
@@ -340,7 +340,15 @@ struct MainFunction {
 }  // namespace
 
 ChromeMainDelegate::ChromeMainDelegate() {
+#if !defined(OS_ANDROID)

[jam, 2013/08/29 15:16:17]

nit: this would be slightly easier to read if the order of the conditions was
reversed

[aberent, 2013/08/29 16:19:44]

Done.

   startup_metric_utils::RecordMainEntryPointTime();
+#else
+// On Android the main entry point time is the time when the Java code starts.
+// This happens before the shared library containing this code is even loaded.
+// The Java startup code has recorded that time, but the C++ code can't fetch it
+// from the Java side until it has initialized the JNI. See
+// ChromeMainDelegateAndroid.
+#endif
 }
 
 ChromeMainDelegate::~ChromeMainDelegate() {