Merge pull request #140 from qsr/roll_mojo

Update to mojo 5561fc7ae1717f8013a873f744fdae116d046e74

Author: qsr

mojo/devtools/common/README.md

@@ -2,36 +2,68 @@
 
 Unopinionated tools for **running**, **debugging** and **testing** Mojo apps.
 
-## Repo contents
+## Install
+
+```
+git clone https://github.com/domokit/devtools.git
+```
 
-Devtools offer the following tools:
+## Contents
 
- - **mojo_shell** - universall shell runner
- - **debugger** - supports interactive tracing and debugging of a running mojo shell
- - **remote_adb_setup** - configures adb on a remote machine to communicate with
+Devtools offers the following tools:
+
+ - `mojo_shell` - universal shell runner
+ - `debugger` - supports interactive tracing and debugging of a running mojo
+   shell
+ - `remote_adb_setup` - configures adb on a remote machine to communicate with
    a device attached to the local machine
 
-and a Python scripting library designed for being embedded (devtoolslib).
+and a Python scripting library designed for being embedded (`devtoolslib`).
 
-### Devtoolslib
+### debugger
 
-**devtoolslib** is a Python module containing the core scripting functionality
-for running Mojo apps: shell abstraction with implementations for Android and
-Linux and support for apptest frameworks. The executable scripts in devtools
-are based on this module.
+The `debugger` script allows you to interactively inspect a running shell,
+collect performance traces and attach a gdb debugger.
 
-As devtools carry no assumptions about build system or file layout being used,
-one can choose to embed the functionality provided by **devtoolslib** in their
-own wrapper, instead of relying on the provided scripts. For examples, one can
-refer to mojo's [apptest
-runner](https://github.com/domokit/mojo/blob/master/mojo/tools/apptest_runner.py).
+#### Tracing
+To collect [performance
+traces](https://www.chromium.org/developers/how-tos/trace-event-profiling-tool)
+and retrieve the result:
 
-## Install
+```sh
+debugger tracing start
+debugger tracing stop [result.json]
+```
 
+The trace file can be then loaded using the trace viewer in Chrome available at
+`about://tracing`.
+
+#### GDB
+It is possible to inspect a Mojo Shell process using GDB. The `debugger` script
+can be used to launch GDB and attach it to a running shell process (android
+only):
+
+```sh
+debugger gdb attach
 ```
-git clone https://github.com/domokit/devtools.git
+
+#### Android crash stacks
+When Mojo shell crashes on Android ("Unfortunately, Mojo shell has stopped.")
+due to a crash in native code, `debugger` can be used to find and symbolize the
+stack trace present in the device log:
+
+```sh
+debugger device stack
 ```
 
+### devtoolslib
+
+**devtoolslib** is a Python module containing the core scripting functionality
+for running Mojo apps: shell abstraction with implementations for Android and
+Linux and support for apptest frameworks. The executable scripts in devtools are
+based on this module. One can also choose to embed the functionality provided by
+**devtoolslib** in their own wrapper.
+
 ## Development
 
 The library is canonically developed [in the mojo

mojo/public/interfaces/network/url_request.mojom

@@ -7,6 +7,22 @@ module mojo;
 import "mojo/public/interfaces/network/http_header.mojom";
 
 struct URLRequest {
+  // Specify the cache behavior of the request.
+  enum CacheMode {
+    // Default behavior.
+    DEFAULT,
+
+    // The HTTP request will bypass the local cache and will have a
+    // 'Cache-Control: nocache' header added in that causes any proxy servers
+    // to also not satisfy the request from their cache.  This has the effect
+    // of forcing a full end-to-end fetch.
+    BYPASS_CACHE,
+
+    // The HTTP request will fail if it cannot serve the requested resource
+    // from the cache (or some equivalent local store).
+    ONLY_FROM_CACHE,
+  };
+
   // The URL to load.
   string url;
 
@@ -29,13 +45,6 @@ struct URLRequest {
   // when a redirect is encounterd, FollowRedirect must be called to proceed.
   bool auto_follow_redirects = false;
 
-  // If set to true, then the HTTP request will bypass the local cache and will
-  // have a 'Cache-Control: nocache' header added in that causes any proxy
-  // servers to also not satisfy the request from their cache.  This has the
-  // effect of forcing a full end-to-end fetch.
-  bool bypass_cache = false;
-
-  // If set to true, then the HTTP request will fail if it cannot serve the
-  // requested resource from the cache (or some equivalent local store).
-  bool only_from_cache = false;
+  // The cache behavior for the request.
+  CacheMode cache_mode = DEFAULT;
 };

mojo/public/tools/NETWORK_SERVICE_VERSION

@@ -1 +1 @@
-7adc0c0aea71c83932625072af90d87cfe0fd132
+custom_build_base_7adc0c0aea71c83932625072af90d87cfe0fd132_issue_1241553003_patchset_1