Update classpath to make Robolectric JUnit tests work in Eclipse.

docs/eclipse.md

Index: docs/eclipse.md
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+# Eclipse Configuration for Android
+[TOC]
+
+Instructions on using **Android Studio** are [here](android_studio.md).
+
+*** note

[dgn, 2016/10/03 15:04:06]

That's really neat! However I couldn't find the documentation for it. Where can
I have a look at the markdown extensions in gitiles? go/g3doc-callouts lists
different ways to do that.

+This documentation was written for Eclipse 4.5 though other versions of Eclipse
+should work similarly.
+***
+
+## One time Eclipse Configuration
+This section contains set up steps for the very first time you start Eclipse.
+You should only need to go through these once, even if you switch workspaces.
+
+ * Starting Eclipse. It can be started a couple of ways:
+    * From Ubuntu main menu, select Applications > Programming > Eclipse 4.5
+    * From the command line, type eclipse45
+ * Pick a workspace somewhere in your hard drive.
+ * Install CDT - C/C++ Development Tools
+    * Select Help > Install New Software... from the main menu
+    * For Work with, select mars - http://download.eclipse.org/releases/mars
+      (or any other mirror that seems appropriate)
+    * Check Mobile and Device Development > C/C++ Remote Launch
+    * Check Programming Languages > C/C++ Development Tools
+    * Click through Next, Finish, etc to complete the wizard.
+    * If you get errors about a missing dependency on org.eclipse.rse.ui for the
+      "C++ Remote Launch" install, add an available update path of
+      http://download.eclipse.org/dsdp/tm/updates/3.2
+    * Click Restart Now when prompted to restart Eclipse
+ * Memory
+    * Close Eclipse
+    * Add the following lines to `~/.eclipse/init.sh`:
+
+      ```shell
+      ECLIPSE_MEM_START=1024m
+      ECLIPSE_MEM_MAX=8192m
+      ```
+
+## General Workspace Configuration
+These are settings that apply to all projects in your workspace. All the
+settings below are inside Window > Preferences.
+
+ * Android formatting
+    * Download [android-formatting.xml](https://raw.githubusercontent.com/android/platform_development/master/ide/eclipse/android-formatting.xml)
+    * Select Java > Code Style > Formatter from the tree on the left
+    * Click Import...
+    * Select the android-formatting.xml file
+    * Make sure Android is set as the Active Profile
+ * Java import order
+    * Download [android.importorder](https://raw.githubusercontent.com/android/platform_development/master/ide/eclipse/android.importorder)
+    * Select Java > Code Style > Organize Imports from the tree on the left
+    * Click Import...
+    * Select the android.importorder file
+ * Disable automatic refresh. Otherwise, Eclipse will constantly try to refresh
+   your projects (which can be slow).
+    * Select General > Workspace from the tree on the left.
+    * Uncheck Refresh using native hooks or polling (if present)
+    * Select General > Startup and Shutdown from the tree on the left.
+    * Uncheck Refresh workspace on startup (if present)
+ * Disable build before launching
+    * Select Run/Debug > Launching
+    * Uncheck Build (if required) before launching
+ * File types for .gyp and .gypi
+    * Go to General > Editors > File Associations
+    * Add `*.gyp` and `*.gypi` file types, and associate them with Python Editor
+       * See http://pydev.org/index.html for instructions on getting a Python
+         Editor configured in Eclipse
+    * Enjoy a happy life with Ctrl+Shift+P and automatic matching bracket
+      highlight.
+ * Tab ordering
+    * If you prefer ordering your tabs by most recently used, go to General >
+      Appearance and check Show most recently used tabs
+ * Autocomplete
+    * Select Java > Editor > Content Assist
+    * Check Enable auto activation
+    * Change Auto activation triggers for Java: to
+      `._abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ`
+ * Line Length
+    * If you want to change the line length indicator, go to General > Editors >
+      Text Editors
+    * Check Show print margin and change the Print margin column: to 100.
+
+## Project Configuration
+
+### Create the project
+
+ * Select File > New > Project... from the main menu.
+ * Select C/C++ > C++ from the project tree and click Next.
+    * Note: not "Makefile Project with Existing Code", even though that sounds
+      sensible).
+ * For Project name, use something meaningful to you. For example
+   "chrome-android”
+ * Uncheck Use default location. Click Browse... and select the src directory of
+   your Chromium gclient checkout
+ * For Project type, use Makefile project > Empty Project
+ * For Toolchains use -- Other Toolchain --
+ * Click Next
+ * Disable the default CDT builder
+    * Click Advanced Settings...
+    * Select Builders from the tree on the left
+    * Uncheck CDT Builder
+    * Click OK if a dialog appears warning you that this is an
+      'advanced feature'
+    * Click OK to close the project properties dialog and return to the project
+      creation wizard
+ * Click Finish to create the project
+
+### Configure the project
+
+ * Right click on the project and select Properties
+ * Exclude Resources (OPTIONAL). This can speed Eclipse up a bit and may make
+   the indexer happier.
+    * Select Resources > Resource Filters
+    * Click Add...
+    * Select Exclude all, Select Folders, and check All children (recursive)
+    * Enter .git as the name
+    * Click OK
+    * Click Apply to commit the changes
+ * C/C++ Indexer (deprecated, seems to be done by default)</span>
+    * Select C/C++ General > Indexer from the tree on the left
+    * Click Restore Defaults
+    * Check Enable project specific settings
+    * Uncheck Index source files not included in the build
+    * Uncheck Allow heuristic resolution of includes
+    * Click Apply to commit the changes
+ * C/C++ Paths and Symbols. This help Eclipse build the symbol table for Chrome.
+    * From a shell, run `GYP_GENERATORS=eclipse build/gyp_chromium`
+    * This generates `<project root>/out/Release/eclipse-cdt-settings.xml` which
+      is used below.
+    * Select C/C++ General > Paths and Symbols from the tree on the left
+    * Click Restore Defaults to clear any old settings
+    * Click Import Settings... The import dialog should appear.
+    * Click Browse... A file browser should appear.
+    * Select `<project root>/out/Release/eclipse-cdt-settings.xml`.
+    * Click the Finish button. The entire preferences dialog should go away.
+    * Right click on the project and select Index > Rebuild
+ * Java
+    * Create a link from `<project root>/.classpath` to
+      `<project root>/tools/android/eclipse/.classpath`:
+      ```shell
+      ln -s tools/android/eclipse/.classpath .classpath
+      ```
+
+ * Edit `<project root>/.project` as follows to make your project a
+   Java project:
+    * Add the following lines inside `<buildSpec>`:
+      ```xml
+      <buildCommand>
+        <name>org.eclipse.jdt.core.javabuilder</name>
+        <arguments></arguments>
+      </buildCommand>
+      ```
+    * Add the following line inside `<natures>`:
+      ```xml
+      <nature>org.eclipse.jdt.core.javanature</nature>
+      ```
+
+### Run Robolectric JUnit tests
+
+ * Prerequisite: Install a Java 8 JRE and make sure it's available in Eclipse
+ * Create a new JUnit test target:
+    * Run > Run Configurations > New launch configuration > JUnit
+    * Using Android JUnit test launcher
+    * Test tab:
+       * Run a single test or all tests in the package you want
+    * Arguments tab:
+       * VM arguments:
+
+         ```
+         -Drobolectric.dependency.dir=out/Debug/lib.java/third_party/robolectric
+         ```
+
+    * Classpath tab:
+       * Bootstrap Entries:
+          * Advanced... > Add Library > JRE System Library
+          * Select a Java 8 JRE
+       * User Entries:
+          * Add JARs...
+          * Select the following JAR files from `third_party/robolectric/lib`:
+             * `json-20080701.jar`
+             * `tagsoup-1.2.jar`
+             * `android-all-5.0.0_r2-robolectric-1.jar`
+    * JRE tab:
+       * Execution environment: Select the Java 8 JRE
+ * Run or Debug the launch configuration
+