[Android] Add chrome_java target for building Java code in the chromium layer.

build/android/envsetup_functions.sh

Index: build/android/envsetup_functions.sh
diff --git a/build/android/envsetup_functions.sh b/build/android/envsetup_functions.sh
index 84c0be5f19a1ac279ee39f226a55300d5b671769..70689301118b2a3b37a8867fd390dd26a81ac1e7 100755
--- a/build/android/envsetup_functions.sh
+++ b/build/android/envsetup_functions.sh
@@ -202,7 +202,10 @@ sdk_build_init() {
   DEFINES+=" android_static_lib='NOT_SDK_COMPLIANT'"
   DEFINES+=\
 " android_sdk=${ANDROID_SDK_ROOT}/platforms/android-${ANDROID_SDK_VERSION}"
+  DEFINES+=" android_sdk_root=${ANDROID_SDK_ROOT}"
   DEFINES+=" android_sdk_tools=${ANDROID_SDK_ROOT}/platform-tools"
+  DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
+  DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"
 
   common_gyp_vars
 
@@ -256,7 +259,10 @@ ${ANDROID_SDK_VERSION}
   # The non-SDK build currently requires the SDK path to build the framework
   # Java aidl files. TODO(steveblock): Investigate avoiding this requirement.
   DEFINES+=" android_sdk=${ANDROID_SDK_ROOT}"
+  DEFINES+=" android_sdk_root=${ANDROID_SDK_ROOT}"
   DEFINES+=" android_sdk_tools=${ANDROID_SDK_ROOT}/../tools/linux"
+  DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
+  DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"
 
   common_gyp_vars
 }
@@ -279,7 +285,10 @@ webview_build_init() {
   DEFINES+=" android_build_type=1"
   DEFINES+=" android_upstream_bringup=1"
   DEFINES+=" android_sdk=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK}"
+  DEFINES+=" android_sdk_root=${ANDROID_SDK_ROOT}"
   DEFINES+=" android_sdk_tools=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK_TOOLS}"
+  DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
+  DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"
   export GYP_DEFINES="${DEFINES}"
 
   export GYP_GENERATORS="android"